Finding the Fourth Proportional to 144,842.71, 217,275.89 and 72,758.55

Step by Step Solution

1. Step 1: Write the proportion equation
   144,842.71 : 217,275.89 = 72,758.55 : x
2. Step 2: Convert to fraction form
   144,842.71/217,275.89 = 72,758.55/x
3. Step 3: Cross multiply
   144,842.71x = 217,275.89 × 72,758.55
4. Step 4: Simplify right side
   144,842.71x = 15,808,677,935.88
5. Step 5: Solve for x
   x = 15,808,677,935.88/144,842.71
6. Step 6: Final answer
   x = 109,143.76