Finding the Fourth Proportional to 111,158,143.47, 166,737,616.17 and 78,711,898.95

Step by Step Solution

1. Step 1: Write the proportion equation
   111,158,143.47 : 166,737,616.17 = 78,711,898.95 : x
2. Step 2: Convert to fraction form
   111,158,143.47/166,737,616.17 = 78,711,898.95/x
3. Step 3: Cross multiply
   111,158,143.47x = 166,737,616.17 × 78,711,898.95
4. Step 4: Simplify right side
   111,158,143.47x = 13,124,234,395,136,926
5. Step 5: Solve for x
   x = 13,124,234,395,136,926/111,158,143.47
6. Step 6: Final answer
   x = 118,068,132.35