Finding the Fourth Proportional to 724,404.10, 1,086,606.15 and 456,715.30

Step by Step Solution

1. Step 1: Write the proportion equation
   724,404.10 : 1,086,606.15 = 456,715.30 : x
2. Step 2: Convert to fraction form
   724,404.10/1,086,606.15 = 456,715.30/x
3. Step 3: Cross multiply
   724,404.10x = 1,086,606.15 × 456,715.30
4. Step 4: Simplify right side
   724,404.10x = 496,269,653,779.10
5. Step 5: Solve for x
   x = 496,269,653,779.10/724,404.10
6. Step 6: Final answer
   x = 685,072.95