Finding the Fourth Proportional to 897,720, 1,238,853.63 and 495,312

Step by Step Solution

1. Step 1: Write the proportion equation
   897,720 : 1,238,853.63 = 495,312 : x
2. Step 2: Convert to fraction form
   897,720/1,238,853.63 = 495,312/x
3. Step 3: Cross multiply
   897,720x = 1,238,853.63 × 495,312
4. Step 4: Simplify right side
   897,720x = 613,619,069,182.56
5. Step 5: Solve for x
   x = 613,619,069,182.56/897,720
6. Step 6: Final answer
   x = 683,530.58