Finding the Fourth Proportional to 893,978.25, 1,233,689.99 and 491,570.25

Step by Step Solution

1. Step 1: Write the proportion equation
   893,978.25 : 1,233,689.99 = 491,570.25 : x
2. Step 2: Convert to fraction form
   893,978.25/1,233,689.99 = 491,570.25/x
3. Step 3: Cross multiply
   893,978.25x = 1,233,689.99 × 491,570.25
4. Step 4: Simplify right side
   893,978.25x = 606,445,294,348.95
5. Step 5: Solve for x
   x = 606,445,294,348.95/893,978.25
6. Step 6: Final answer
   x = 678,366.95