Finding the Fourth Proportional to 427,290,128.22, 640,845,510.54 and 120,510,496.56

Step by Step Solution

1. Step 1: Write the proportion equation
   427,290,128.22 : 640,845,510.54 = 120,510,496.56 : x
2. Step 2: Convert to fraction form
   427,290,128.22/640,845,510.54 = 120,510,496.56/x
3. Step 3: Cross multiply
   427,290,128.22x = 640,845,510.54 × 120,510,496.56
4. Step 4: Simplify right side
   427,290,128.22x = 77,228,610,693,422,112
5. Step 5: Solve for x
   x = 77,228,610,693,422,112/427,290,128.22
6. Step 6: Final answer
   x = 180,740,451.49