Finding the Fourth Proportional to 866,861.99, 1,196,359.59 and 499,351.83

Step by Step Solution

1. Step 1: Write the proportion equation
   866,861.99 : 1,196,359.59 = 499,351.83 : x
2. Step 2: Convert to fraction form
   866,861.99/1,196,359.59 = 499,351.83/x
3. Step 3: Cross multiply
   866,861.99x = 1,196,359.59 × 499,351.83
4. Step 4: Simplify right side
   866,861.99x = 597,404,345,181.92
5. Step 5: Solve for x
   x = 597,404,345,181.92/866,861.99
6. Step 6: Final answer
   x = 689,157.39