Finding the Fourth Proportional to 423,076.06, 634,673.49 and 123,578.62

Step by Step Solution

1. Step 1: Write the proportion equation
   423,076.06 : 634,673.49 = 123,578.62 : x
2. Step 2: Convert to fraction form
   423,076.06/634,673.49 = 123,578.62/x
3. Step 3: Cross multiply
   423,076.06x = 634,673.49 × 123,578.62
4. Step 4: Simplify right side
   423,076.06x = 78,432,074,044.78
5. Step 5: Solve for x
   x = 78,432,074,044.78/423,076.06
6. Step 6: Final answer
   x = 185,385.28