Finding the Fourth Proportional to 2,520.90, 3,478.77 and 1,588.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.90 : 3,478.77 = 1,588.50 : x
2. Step 2: Convert to fraction form
   2,520.90/3,478.77 = 1,588.50/x
3. Step 3: Cross multiply
   2,520.90x = 3,478.77 × 1,588.50
4. Step 4: Simplify right side
   2,520.90x = 5,526,026.15
5. Step 5: Solve for x
   x = 5,526,026.15/2,520.90
6. Step 6: Final answer
   x = 2,192.08