Finding the Fourth Proportional to 1,009,417.04, 1,392,643.76 and 647,040.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009,417.04 : 1,392,643.76 = 647,040.72 : x
2. Step 2: Convert to fraction form
   1,009,417.04/1,392,643.76 = 647,040.72/x
3. Step 3: Cross multiply
   1,009,417.04x = 1,392,643.76 × 647,040.72
4. Step 4: Simplify right side
   1,009,417.04x = 901,097,221,173.91
5. Step 5: Solve for x
   x = 901,097,221,173.91/1,009,417.04
6. Step 6: Final answer
   x = 892,690.72