Finding the Fourth Proportional to 648,466.72, 894,726.48 and 380,142.88

Step by Step Solution

1. Step 1: Write the proportion equation
   648,466.72 : 894,726.48 = 380,142.88 : x
2. Step 2: Convert to fraction form
   648,466.72/894,726.48 = 380,142.88/x
3. Step 3: Cross multiply
   648,466.72x = 894,726.48 × 380,142.88
4. Step 4: Simplify right side
   648,466.72x = 340,123,900,919.46
5. Step 5: Solve for x
   x = 340,123,900,919.46/648,466.72
6. Step 6: Final answer
   x = 524,504.79