Finding the Fourth Proportional to 103,693.59, 143,111.07 and 58,380.57

Step by Step Solution

1. Step 1: Write the proportion equation
   103,693.59 : 143,111.07 = 58,380.57 : x
2. Step 2: Convert to fraction form
   103,693.59/143,111.07 = 58,380.57/x
3. Step 3: Cross multiply
   103,693.59x = 143,111.07 × 58,380.57
4. Step 4: Simplify right side
   103,693.59x = 8,354,905,839.91
5. Step 5: Solve for x
   x = 8,354,905,839.91/103,693.59
6. Step 6: Final answer
   x = 80,573.02