Finding the Fourth Proportional to 478,241.83, 659,948.42 and 274,282.21

Step by Step Solution

1. Step 1: Write the proportion equation
   478,241.83 : 659,948.42 = 274,282.21 : x
2. Step 2: Convert to fraction form
   478,241.83/659,948.42 = 274,282.21/x
3. Step 3: Cross multiply
   478,241.83x = 659,948.42 × 274,282.21
4. Step 4: Simplify right side
   478,241.83x = 181,012,111,123.61
5. Step 5: Solve for x
   x = 181,012,111,123.61/478,241.83
6. Step 6: Final answer
   x = 378,494.94