Finding the Fourth Proportional to 497,585.76, 686,642.42 and 282,696

Step by Step Solution

1. Step 1: Write the proportion equation
   497,585.76 : 686,642.42 = 282,696 : x
2. Step 2: Convert to fraction form
   497,585.76/686,642.42 = 282,696/x
3. Step 3: Cross multiply
   497,585.76x = 686,642.42 × 282,696
4. Step 4: Simplify right side
   497,585.76x = 194,111,065,564.32
5. Step 5: Solve for x
   x = 194,111,065,564.32/497,585.76
6. Step 6: Final answer
   x = 390,105.75