Finding the Fourth Proportional to 2,625.56, 3,937.98 and 870.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,625.56 : 3,937.98 = 870.12 : x
2. Step 2: Convert to fraction form
   2,625.56/3,937.98 = 870.12/x
3. Step 3: Cross multiply
   2,625.56x = 3,937.98 × 870.12
4. Step 4: Simplify right side
   2,625.56x = 3,426,515.16
5. Step 5: Solve for x
   x = 3,426,515.16/2,625.56
6. Step 6: Final answer
   x = 1,305.06