Finding the Fourth Proportional to 861,498.28, 1,188,867.66 and 479,516.88

Step by Step Solution

1. Step 1: Write the proportion equation
   861,498.28 : 1,188,867.66 = 479,516.88 : x
2. Step 2: Convert to fraction form
   861,498.28/1,188,867.66 = 479,516.88/x
3. Step 3: Cross multiply
   861,498.28x = 1,188,867.66 × 479,516.88
4. Step 4: Simplify right side
   861,498.28x = 570,082,111,056.10
5. Step 5: Solve for x
   x = 570,082,111,056.10/861,498.28
6. Step 6: Final answer
   x = 661,733.31