Finding the Fourth Proportional to 1,679.31, 2,520.72 and 1,577.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.31 : 2,520.72 = 1,577.25 : x
2. Step 2: Convert to fraction form
   1,679.31/2,520.72 = 1,577.25/x
3. Step 3: Cross multiply
   1,679.31x = 2,520.72 × 1,577.25
4. Step 4: Simplify right side
   1,679.31x = 3,975,805.62
5. Step 5: Solve for x
   x = 3,975,805.62/1,679.31
6. Step 6: Final answer
   x = 2,367.52