Finding the Fourth Proportional to 897,784.47, 1,238,972.43 and 489,908.69

Step by Step Solution

1. Step 1: Write the proportion equation
   897,784.47 : 1,238,972.43 = 489,908.69 : x
2. Step 2: Convert to fraction form
   897,784.47/1,238,972.43 = 489,908.69/x
3. Step 3: Cross multiply
   897,784.47x = 1,238,972.43 × 489,908.69
4. Step 4: Simplify right side
   897,784.47x = 606,983,353,932.56
5. Step 5: Solve for x
   x = 606,983,353,932.56/897,784.47
6. Step 6: Final answer
   x = 676,090.28