Finding the Fourth Proportional to 111,158,142.47, 166,737,614.67 and 78,711,897.95

Step by Step Solution

1. Step 1: Write the proportion equation
   111,158,142.47 : 166,737,614.67 = 78,711,897.95 : x
2. Step 2: Convert to fraction form
   111,158,142.47/166,737,614.67 = 78,711,897.95/x
3. Step 3: Cross multiply
   111,158,142.47x = 166,737,614.67 × 78,711,897.95
4. Step 4: Simplify right side
   111,158,142.47x = 13,124,234,110,331,462
5. Step 5: Solve for x
   x = 13,124,234,110,331,462/111,158,142.47
6. Step 6: Final answer
   x = 118,068,130.85