Finding the Fourth Proportional to 156,769,978.52, 216,343,411.54 and 86,210,138.68

Step by Step Solution

1. Step 1: Write the proportion equation
   156,769,978.52 : 216,343,411.54 = 86,210,138.68 : x
2. Step 2: Convert to fraction form
   156,769,978.52/216,343,411.54 = 86,210,138.68/x
3. Step 3: Cross multiply
   156,769,978.52x = 216,343,411.54 × 86,210,138.68
4. Step 4: Simplify right side
   156,769,978.52x = 18,650,995,510,611,328
5. Step 5: Solve for x
   x = 18,650,995,510,611,328/156,769,978.52
6. Step 6: Final answer
   x = 118,970,453.95