Finding the Fourth Proportional to 2,600.60, 3,588.88 and 1,421.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,600.60 : 3,588.88 = 1,421.72 : x
2. Step 2: Convert to fraction form
   2,600.60/3,588.88 = 1,421.72/x
3. Step 3: Cross multiply
   2,600.60x = 3,588.88 × 1,421.72
4. Step 4: Simplify right side
   2,600.60x = 5,102,382.47
5. Step 5: Solve for x
   x = 5,102,382.47/2,600.60
6. Step 6: Final answer
   x = 1,962.00