Finding the Fourth Proportional to 499,251, 748,728.72 and 144,268.32

Step by Step Solution

1. Step 1: Write the proportion equation
   499,251 : 748,728.72 = 144,268.32 : x
2. Step 2: Convert to fraction form
   499,251/748,728.72 = 144,268.32/x
3. Step 3: Cross multiply
   499,251x = 748,728.72 × 144,268.32
4. Step 4: Simplify right side
   499,251x = 108,017,834,570.15
5. Step 5: Solve for x
   x = 108,017,834,570.15/499,251
6. Step 6: Final answer
   x = 216,359.78