Finding the Fourth Proportional to 880,531, 1,215,132.78 and 478,123

Step by Step Solution

1. Step 1: Write the proportion equation
   880,531 : 1,215,132.78 = 478,123 : x
2. Step 2: Convert to fraction form
   880,531/1,215,132.78 = 478,123/x
3. Step 3: Cross multiply
   880,531x = 1,215,132.78 × 478,123
4. Step 4: Simplify right side
   880,531x = 580,982,930,171.94
5. Step 5: Solve for x
   x = 580,982,930,171.94/880,531
6. Step 6: Final answer
   x = 659,809.74