Finding the Fourth Proportional to 103,521.57, 142,864.83 and 58,213.81

Step by Step Solution

1. Step 1: Write the proportion equation
   103,521.57 : 142,864.83 = 58,213.81 : x
2. Step 2: Convert to fraction form
   103,521.57/142,864.83 = 58,213.81/x
3. Step 3: Cross multiply
   103,521.57x = 142,864.83 × 58,213.81
4. Step 4: Simplify right side
   103,521.57x = 8,316,706,069.30
5. Step 5: Solve for x
   x = 8,316,706,069.30/103,521.57
6. Step 6: Final answer
   x = 80,337.91