Finding the Fourth Proportional to 103,443.78, 142,752.51 and 58,731.78

Step by Step Solution

1. Step 1: Write the proportion equation
   103,443.78 : 142,752.51 = 58,731.78 : x
2. Step 2: Convert to fraction form
   103,443.78/142,752.51 = 58,731.78/x
3. Step 3: Cross multiply
   103,443.78x = 142,752.51 × 58,731.78
4. Step 4: Simplify right side
   103,443.78x = 8,384,109,011.77
5. Step 5: Solve for x
   x = 8,384,109,011.77/103,443.78
6. Step 6: Final answer
   x = 81,049.91