Finding the Fourth Proportional to 781,320, 1,078,221.60 and 423,624

Step by Step Solution

1. Step 1: Write the proportion equation
   781,320 : 1,078,221.60 = 423,624 : x
2. Step 2: Convert to fraction form
   781,320/1,078,221.60 = 423,624/x
3. Step 3: Cross multiply
   781,320x = 1,078,221.60 × 423,624
4. Step 4: Simplify right side
   781,320x = 456,760,547,078.40
5. Step 5: Solve for x
   x = 456,760,547,078.40/781,320
6. Step 6: Final answer
   x = 584,601.12