Finding the Fourth Proportional to 709,002.55, 978,506.24 and 403,124.76

Step by Step Solution

1. Step 1: Write the proportion equation
   709,002.55 : 978,506.24 = 403,124.76 : x
2. Step 2: Convert to fraction form
   709,002.55/978,506.24 = 403,124.76/x
3. Step 3: Cross multiply
   709,002.55x = 978,506.24 × 403,124.76
4. Step 4: Simplify right side
   709,002.55x = 394,460,091,142.88
5. Step 5: Solve for x
   x = 394,460,091,142.88/709,002.55
6. Step 6: Final answer
   x = 556,359.20