Finding the Fourth Proportional to 2,870.25, 4,307.00 and 1,331.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.25 : 4,307.00 = 1,331.25 : x
2. Step 2: Convert to fraction form
   2,870.25/4,307.00 = 1,331.25/x
3. Step 3: Cross multiply
   2,870.25x = 4,307.00 × 1,331.25
4. Step 4: Simplify right side
   2,870.25x = 5,733,687.09
5. Step 5: Solve for x
   x = 5,733,687.09/2,870.25
6. Step 6: Final answer
   x = 1,997.63