Finding the Fourth Proportional to 112,355,123.70, 168,532,685.55 and 78,314,906.10

Step by Step Solution

1. Step 1: Write the proportion equation
   112,355,123.70 : 168,532,685.55 = 78,314,906.10 : x
2. Step 2: Convert to fraction form
   112,355,123.70/168,532,685.55 = 78,314,906.10/x
3. Step 3: Cross multiply
   112,355,123.70x = 168,532,685.55 × 78,314,906.10
4. Step 4: Simplify right side
   112,355,123.70x = 13,198,621,443,629,076
5. Step 5: Solve for x
   x = 13,198,621,443,629,076/112,355,123.70
6. Step 6: Final answer
   x = 117,472,359.15