Finding the Fourth Proportional to 1,397,550,973.52, 2,096,250,877.56 and 428,205,388.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397,550,973.52 : 2,096,250,877.56 = 428,205,388.88 : x
2. Step 2: Convert to fraction form
   1,397,550,973.52/2,096,250,877.56 = 428,205,388.88/x
3. Step 3: Cross multiply
   1,397,550,973.52x = 2,096,250,877.56 × 428,205,388.88
4. Step 4: Simplify right side
   1,397,550,973.52x = 897,625,922,215,620,992
5. Step 5: Solve for x
   x = 897,625,922,215,620,992/1,397,550,973.52
6. Step 6: Final answer
   x = 642,284,925.00