Finding the Fourth Proportional to 687,061.08, 948,096.36 and 396,684.18

Step by Step Solution

1. Step 1: Write the proportion equation
   687,061.08 : 948,096.36 = 396,684.18 : x
2. Step 2: Convert to fraction form
   687,061.08/948,096.36 = 396,684.18/x
3. Step 3: Cross multiply
   687,061.08x = 948,096.36 × 396,684.18
4. Step 4: Simplify right side
   687,061.08x = 376,094,827,127.59
5. Step 5: Solve for x
   x = 376,094,827,127.59/687,061.08
6. Step 6: Final answer
   x = 547,396.50