Finding the Fourth Proportional to 143,665.52, 215,498.68 and 143,457.92

Step by Step Solution

1. Step 1: Write the proportion equation
   143,665.52 : 215,498.68 = 143,457.92 : x
2. Step 2: Convert to fraction form
   143,665.52/215,498.68 = 143,457.92/x
3. Step 3: Cross multiply
   143,665.52x = 215,498.68 × 143,457.92
4. Step 4: Simplify right side
   143,665.52x = 30,914,992,395.55
5. Step 5: Solve for x
   x = 30,914,992,395.55/143,665.52
6. Step 6: Final answer
   x = 215,187.28