Finding the Fourth Proportional to 143,354.88, 214,965.12 and 76,782.72

Step by Step Solution

1. Step 1: Write the proportion equation
   143,354.88 : 214,965.12 = 76,782.72 : x
2. Step 2: Convert to fraction form
   143,354.88/214,965.12 = 76,782.72/x
3. Step 3: Cross multiply
   143,354.88x = 214,965.12 × 76,782.72
4. Step 4: Simplify right side
   143,354.88x = 16,505,606,618.73
5. Step 5: Solve for x
   x = 16,505,606,618.73/143,354.88
6. Step 6: Final answer
   x = 115,138.09