Finding the Fourth Proportional to 103,931.83, 143,426.29 and 56,185.18

Step by Step Solution

1. Step 1: Write the proportion equation
   103,931.83 : 143,426.29 = 56,185.18 : x
2. Step 2: Convert to fraction form
   103,931.83/143,426.29 = 56,185.18/x
3. Step 3: Cross multiply
   103,931.83x = 143,426.29 × 56,185.18
4. Step 4: Simplify right side
   103,931.83x = 8,058,431,920.38
5. Step 5: Solve for x
   x = 8,058,431,920.38/103,931.83
6. Step 6: Final answer
   x = 77,535.75