Finding the Fourth Proportional to 156,280,196.72, 215,673,641.88 and 86,660,900.84

Step by Step Solution

1. Step 1: Write the proportion equation
   156,280,196.72 : 215,673,641.88 = 86,660,900.84 : x
2. Step 2: Convert to fraction form
   156,280,196.72/215,673,641.88 = 86,660,900.84/x
3. Step 3: Cross multiply
   156,280,196.72x = 215,673,641.88 × 86,660,900.84
4. Step 4: Simplify right side
   156,280,196.72x = 18,690,472,092,764,352
5. Step 5: Solve for x
   x = 18,690,472,092,764,352/156,280,196.72
6. Step 6: Final answer
   x = 119,595,908.41