Finding the Fourth Proportional to 478,499.69, 660,326.33 and 263,634.77

Step by Step Solution

1. Step 1: Write the proportion equation
   478,499.69 : 660,326.33 = 263,634.77 : x
2. Step 2: Convert to fraction form
   478,499.69/660,326.33 = 263,634.77/x
3. Step 3: Cross multiply
   478,499.69x = 660,326.33 × 263,634.77
4. Step 4: Simplify right side
   478,499.69x = 174,084,978,816.32
5. Step 5: Solve for x
   x = 174,084,978,816.32/478,499.69
6. Step 6: Final answer
   x = 363,814.19