Finding the Fourth Proportional to 91,341,405.54, 137,129,025.32 and 78,469,904.52

Step by Step Solution

1. Step 1: Write the proportion equation
   91,341,405.54 : 137,129,025.32 = 78,469,904.52 : x
2. Step 2: Convert to fraction form
   91,341,405.54/137,129,025.32 = 78,469,904.52/x
3. Step 3: Cross multiply
   91,341,405.54x = 137,129,025.32 × 78,469,904.52
4. Step 4: Simplify right side
   91,341,405.54x = 10,760,501,522,703,068
5. Step 5: Solve for x
   x = 10,760,501,522,703,068/91,341,405.54
6. Step 6: Final answer
   x = 117,805,298.26