Finding the Fourth Proportional to 1,150,147.32, 1,587,229.74 and 640,880.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150,147.32 : 1,587,229.74 = 640,880.76 : x
2. Step 2: Convert to fraction form
   1,150,147.32/1,587,229.74 = 640,880.76/x
3. Step 3: Cross multiply
   1,150,147.32x = 1,587,229.74 × 640,880.76
4. Step 4: Simplify right side
   1,150,147.32x = 1,017,225,002,065.80
5. Step 5: Solve for x
   x = 1,017,225,002,065.80/1,150,147.32
6. Step 6: Final answer
   x = 884,430.18