Finding the Fourth Proportional to 1,428,064.56, 1,969,113.24 and 911,126.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428,064.56 : 1,969,113.24 = 911,126.88 : x
2. Step 2: Convert to fraction form
   1,428,064.56/1,969,113.24 = 911,126.88/x
3. Step 3: Cross multiply
   1,428,064.56x = 1,969,113.24 × 911,126.88
4. Step 4: Simplify right side
   1,428,064.56x = 1,794,112,002,727.89
5. Step 5: Solve for x
   x = 1,794,112,002,727.89/1,428,064.56
6. Step 6: Final answer
   x = 1,256,324.16