Finding the Fourth Proportional to 103,681.50, 143,080.47 and 58,978.14

Step by Step Solution

1. Step 1: Write the proportion equation
   103,681.50 : 143,080.47 = 58,978.14 : x
2. Step 2: Convert to fraction form
   103,681.50/143,080.47 = 58,978.14/x
3. Step 3: Cross multiply
   103,681.50x = 143,080.47 × 58,978.14
4. Step 4: Simplify right side
   103,681.50x = 8,438,619,990.93
5. Step 5: Solve for x
   x = 8,438,619,990.93/103,681.50
6. Step 6: Final answer
   x = 81,389.83