Finding the Fourth Proportional to 98,617.50, 136,092.69 and 53,905.50

Step by Step Solution

1. Step 1: Write the proportion equation
   98,617.50 : 136,092.69 = 53,905.50 : x
2. Step 2: Convert to fraction form
   98,617.50/136,092.69 = 53,905.50/x
3. Step 3: Cross multiply
   98,617.50x = 136,092.69 × 53,905.50
4. Step 4: Simplify right side
   98,617.50x = 7,336,144,500.80
5. Step 5: Solve for x
   x = 7,336,144,500.80/98,617.50
6. Step 6: Final answer
   x = 74,389.89