Finding the Fourth Proportional to 103,685.76, 143,086.56 and 58,973.76

Step by Step Solution

1. Step 1: Write the proportion equation
   103,685.76 : 143,086.56 = 58,973.76 : x
2. Step 2: Convert to fraction form
   103,685.76/143,086.56 = 58,973.76/x
3. Step 3: Cross multiply
   103,685.76x = 143,086.56 × 58,973.76
4. Step 4: Simplify right side
   103,685.76x = 8,438,352,448.67
5. Step 5: Solve for x
   x = 8,438,352,448.67/103,685.76
6. Step 6: Final answer
   x = 81,383.91