Finding the Fourth Proportional to 91,780.83, 137,493.59 and 53,737.97

Step by Step Solution

1. Step 1: Write the proportion equation
   91,780.83 : 137,493.59 = 53,737.97 : x
2. Step 2: Convert to fraction form
   91,780.83/137,493.59 = 53,737.97/x
3. Step 3: Cross multiply
   91,780.83x = 137,493.59 × 53,737.97
4. Step 4: Simplify right side
   91,780.83x = 7,388,625,458.45
5. Step 5: Solve for x
   x = 7,388,625,458.45/91,780.83
6. Step 6: Final answer
   x = 80,502.93