Finding the Fourth Proportional to 385,660,499.20, 578,257,634.56 and 155,360,606.72

Step by Step Solution

1. Step 1: Write the proportion equation
   385,660,499.20 : 578,257,634.56 = 155,360,606.72 : x
2. Step 2: Convert to fraction form
   385,660,499.20/578,257,634.56 = 155,360,606.72/x
3. Step 3: Cross multiply
   385,660,499.20x = 578,257,634.56 × 155,360,606.72
4. Step 4: Simplify right side
   385,660,499.20x = 89,838,456,945,713,632
5. Step 5: Solve for x
   x = 89,838,456,945,713,632/385,660,499.20
6. Step 6: Final answer
   x = 232,947,001.66