Finding the Fourth Proportional to 103,663.80, 155,265.30 and 89,839.80

Step by Step Solution

1. Step 1: Write the proportion equation
   103,663.80 : 155,265.30 = 89,839.80 : x
2. Step 2: Convert to fraction form
   103,663.80/155,265.30 = 89,839.80/x
3. Step 3: Cross multiply
   103,663.80x = 155,265.30 × 89,839.80
4. Step 4: Simplify right side
   103,663.80x = 13,949,003,498.94
5. Step 5: Solve for x
   x = 13,949,003,498.94/103,663.80
6. Step 6: Final answer
   x = 134,560.02