Finding the Fourth Proportional to 1,638,223.20, 2,260,758.52 and 913,116.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,223.20 : 2,260,758.52 = 913,116.96 : x
2. Step 2: Convert to fraction form
   1,638,223.20/2,260,758.52 = 913,116.96/x
3. Step 3: Cross multiply
   1,638,223.20x = 2,260,758.52 × 913,116.96
4. Step 4: Simplify right side
   1,638,223.20x = 2,064,336,947,076.50
5. Step 5: Solve for x
   x = 2,064,336,947,076.50/1,638,223.20
6. Step 6: Final answer
   x = 1,260,107.26