Finding the Fourth Proportional to 99,469.98, 137,224.98 and 65,434.68

Step by Step Solution

1. Step 1: Write the proportion equation
   99,469.98 : 137,224.98 = 65,434.68 : x
2. Step 2: Convert to fraction form
   99,469.98/137,224.98 = 65,434.68/x
3. Step 3: Cross multiply
   99,469.98x = 137,224.98 × 65,434.68
4. Step 4: Simplify right side
   99,469.98x = 8,979,272,654.31
5. Step 5: Solve for x
   x = 8,979,272,654.31/99,469.98
6. Step 6: Final answer
   x = 90,271.18