Finding the Fourth Proportional to 91,098.20, 136,646.70 and 42,406.52

Step by Step Solution

1. Step 1: Write the proportion equation
   91,098.20 : 136,646.70 = 42,406.52 : x
2. Step 2: Convert to fraction form
   91,098.20/136,646.70 = 42,406.52/x
3. Step 3: Cross multiply
   91,098.20x = 136,646.70 × 42,406.52
4. Step 4: Simplify right side
   91,098.20x = 5,794,711,016.48
5. Step 5: Solve for x
   x = 5,794,711,016.48/91,098.20
6. Step 6: Final answer
   x = 63,609.50