Finding the Fourth Proportional to 103,561.35, 142,913.30 and 58,239.31

Step by Step Solution

1. Step 1: Write the proportion equation
   103,561.35 : 142,913.30 = 58,239.31 : x
2. Step 2: Convert to fraction form
   103,561.35/142,913.30 = 58,239.31/x
3. Step 3: Cross multiply
   103,561.35x = 142,913.30 × 58,239.31
4. Step 4: Simplify right side
   103,561.35x = 8,323,172,193.51
5. Step 5: Solve for x
   x = 8,323,172,193.51/103,561.35
6. Step 6: Final answer
   x = 80,369.49