Finding the Fourth Proportional to 103,969.43, 143,478.15 and 56,223.12

Step by Step Solution

1. Step 1: Write the proportion equation
   103,969.43 : 143,478.15 = 56,223.12 : x
2. Step 2: Convert to fraction form
   103,969.43/143,478.15 = 56,223.12/x
3. Step 3: Cross multiply
   103,969.43x = 143,478.15 × 56,223.12
4. Step 4: Simplify right side
   103,969.43x = 8,066,789,244.83
5. Step 5: Solve for x
   x = 8,066,789,244.83/103,969.43
6. Step 6: Final answer
   x = 77,588.09