Finding the Fourth Proportional to 103,704.48, 142,810.82 and 90,086.29

Step by Step Solution

1. Step 1: Write the proportion equation
   103,704.48 : 142,810.82 = 90,086.29 : x
2. Step 2: Convert to fraction form
   103,704.48/142,810.82 = 90,086.29/x
3. Step 3: Cross multiply
   103,704.48x = 142,810.82 × 90,086.29
4. Step 4: Simplify right side
   103,704.48x = 12,865,296,945.66
5. Step 5: Solve for x
   x = 12,865,296,945.66/103,704.48
6. Step 6: Final answer
   x = 124,057.29