Finding the Fourth Proportional to 478,251.27, 659,978.69 and 263,411.33

Step by Step Solution

1. Step 1: Write the proportion equation
   478,251.27 : 659,978.69 = 263,411.33 : x
2. Step 2: Convert to fraction form
   478,251.27/659,978.69 = 263,411.33/x
3. Step 3: Cross multiply
   478,251.27x = 659,978.69 × 263,411.33
4. Step 4: Simplify right side
   478,251.27x = 173,845,859,887.61
5. Step 5: Solve for x
   x = 173,845,859,887.61/478,251.27
6. Step 6: Final answer
   x = 363,503.19