Finding the Fourth Proportional to 103,665.19, 143,057.82 and 58,343.50

Step by Step Solution

1. Step 1: Write the proportion equation
   103,665.19 : 143,057.82 = 58,343.50 : x
2. Step 2: Convert to fraction form
   103,665.19/143,057.82 = 58,343.50/x
3. Step 3: Cross multiply
   103,665.19x = 143,057.82 × 58,343.50
4. Step 4: Simplify right side
   103,665.19x = 8,346,493,921.17
5. Step 5: Solve for x
   x = 8,346,493,921.17/103,665.19
6. Step 6: Final answer
   x = 80,513.95