Finding the Third Proportional to 721,140 and 1,121,040

Step by Step Solution

1. Step 1: Write the proportion equation
   721,140 : 1,121,040 = 1,121,040 : x
2. Step 2: Convert to fraction form
   721,140/1,121,040 = 1,121,040/x
3. Step 3: Cross multiply
   721,140x = 1,121,040 × 1,121,040
4. Step 4: Simplify right side
   721,140x = 1,256,730,681,600
5. Step 5: Solve for x
   x = 1,256,730,681,600/721,140
6. Step 6: Final answer
   x = 1,742,700.00