Finding the Fourth Proportional to 143,498.24, 215,247 and 68,390.72

Step by Step Solution

1. Step 1: Write the proportion equation
   143,498.24 : 215,247 = 68,390.72 : x
2. Step 2: Convert to fraction form
   143,498.24/215,247 = 68,390.72/x
3. Step 3: Cross multiply
   143,498.24x = 215,247 × 68,390.72
4. Step 4: Simplify right side
   143,498.24x = 14,720,897,307.84
5. Step 5: Solve for x
   x = 14,720,897,307.84/143,498.24
6. Step 6: Final answer
   x = 102,585.91