Finding the Fourth Proportional to 103,786.29, 143,175.37 and 99,762.61

Step by Step Solution

1. Step 1: Write the proportion equation
   103,786.29 : 143,175.37 = 99,762.61 : x
2. Step 2: Convert to fraction form
   103,786.29/143,175.37 = 99,762.61/x
3. Step 3: Cross multiply
   103,786.29x = 143,175.37 × 99,762.61
4. Step 4: Simplify right side
   103,786.29x = 14,283,548,100.10
5. Step 5: Solve for x
   x = 14,283,548,100.10/103,786.29
6. Step 6: Final answer
   x = 137,624.61