Finding the Fourth Proportional to 506,061.78, 698,409.72 and 279,751.02

Step by Step Solution

1. Step 1: Write the proportion equation
   506,061.78 : 698,409.72 = 279,751.02 : x
2. Step 2: Convert to fraction form
   506,061.78/698,409.72 = 279,751.02/x
3. Step 3: Cross multiply
   506,061.78x = 698,409.72 × 279,751.02
4. Step 4: Simplify right side
   506,061.78x = 195,380,831,547.91
5. Step 5: Solve for x
   x = 195,380,831,547.91/506,061.78
6. Step 6: Final answer
   x = 386,080.99