Finding the Fourth Proportional to 91,992.52, 137,713.76 and 56,341.60

Step by Step Solution

1. Step 1: Write the proportion equation
   91,992.52 : 137,713.76 = 56,341.60 : x
2. Step 2: Convert to fraction form
   91,992.52/137,713.76 = 56,341.60/x
3. Step 3: Cross multiply
   91,992.52x = 137,713.76 × 56,341.60
4. Step 4: Simplify right side
   91,992.52x = 7,759,013,580.42
5. Step 5: Solve for x
   x = 7,759,013,580.42/91,992.52
6. Step 6: Final answer
   x = 84,343.96