Finding the Fourth Proportional to 617,123.02, 925,351.69 and 279,979.71

Step by Step Solution

1. Step 1: Write the proportion equation
   617,123.02 : 925,351.69 = 279,979.71 : x
2. Step 2: Convert to fraction form
   617,123.02/925,351.69 = 279,979.71/x
3. Step 3: Cross multiply
   617,123.02x = 925,351.69 × 279,979.71
4. Step 4: Simplify right side
   617,123.02x = 259,079,693,381.71
5. Step 5: Solve for x
   x = 259,079,693,381.71/617,123.02
6. Step 6: Final answer
   x = 419,818.55