Finding the Third Proportional to 721,431.56 and 1,142,307.56

Step by Step Solution

1. Step 1: Write the proportion equation
   721,431.56 : 1,142,307.56 = 1,142,307.56 : x
2. Step 2: Convert to fraction form
   721,431.56/1,142,307.56 = 1,142,307.56/x
3. Step 3: Cross multiply
   721,431.56x = 1,142,307.56 × 1,142,307.56
4. Step 4: Simplify right side
   721,431.56x = 1,304,866,567,344.69
5. Step 5: Solve for x
   x = 1,304,866,567,344.69/721,431.56
6. Step 6: Final answer
   x = 1,808,718.44