Finding the Fourth Proportional to 478,773, 660,766.59 and 274,887.83

Step by Step Solution

1. Step 1: Write the proportion equation
   478,773 : 660,766.59 = 274,887.83 : x
2. Step 2: Convert to fraction form
   478,773/660,766.59 = 274,887.83/x
3. Step 3: Cross multiply
   478,773x = 660,766.59 × 274,887.83
4. Step 4: Simplify right side
   478,773x = 181,636,690,757.77
5. Step 5: Solve for x
   x = 181,636,690,757.77/478,773
6. Step 6: Final answer
   x = 379,379.56