Finding the Fourth Proportional to 442,718.71, 610,904.72 and 249,123.05

Step by Step Solution

1. Step 1: Write the proportion equation
   442,718.71 : 610,904.72 = 249,123.05 : x
2. Step 2: Convert to fraction form
   442,718.71/610,904.72 = 249,123.05/x
3. Step 3: Cross multiply
   442,718.71x = 610,904.72 × 249,123.05
4. Step 4: Simplify right side
   442,718.71x = 152,190,445,213.33
5. Step 5: Solve for x
   x = 152,190,445,213.33/442,718.71
6. Step 6: Final answer
   x = 343,763.30