Finding the Fourth Proportional to 495,094.10, 683,179.98 and 280,196.75

Step by Step Solution

1. Step 1: Write the proportion equation
   495,094.10 : 683,179.98 = 280,196.75 : x
2. Step 2: Convert to fraction form
   495,094.10/683,179.98 = 280,196.75/x
3. Step 3: Cross multiply
   495,094.10x = 683,179.98 × 280,196.75
4. Step 4: Simplify right side
   495,094.10x = 191,424,810,061.07
5. Step 5: Solve for x
   x = 191,424,810,061.07/495,094.10
6. Step 6: Final answer
   x = 386,643.29