Finding the Fourth Proportional to 103,581.10, 142,931.55 and 58,251.88

Step by Step Solution

1. Step 1: Write the proportion equation
   103,581.10 : 142,931.55 = 58,251.88 : x
2. Step 2: Convert to fraction form
   103,581.10/142,931.55 = 58,251.88/x
3. Step 3: Cross multiply
   103,581.10x = 142,931.55 × 58,251.88
4. Step 4: Simplify right side
   103,581.10x = 8,326,031,498.81
5. Step 5: Solve for x
   x = 8,326,031,498.81/103,581.10
6. Step 6: Final answer
   x = 80,381.76