Finding the Fourth Proportional to 103,726.31, 143,140.73 and 58,404.15

Step by Step Solution

1. Step 1: Write the proportion equation
   103,726.31 : 143,140.73 = 58,404.15 : x
2. Step 2: Convert to fraction form
   103,726.31/143,140.73 = 58,404.15/x
3. Step 3: Cross multiply
   103,726.31x = 143,140.73 × 58,404.15
4. Step 4: Simplify right side
   103,726.31x = 8,360,012,374.01
5. Step 5: Solve for x
   x = 8,360,012,374.01/103,726.31
6. Step 6: Final answer
   x = 80,596.84