Finding the Fourth Proportional to 2,526.50, 3,485.58 and 1,581.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,526.50 : 3,485.58 = 1,581.90 : x
2. Step 2: Convert to fraction form
   2,526.50/3,485.58 = 1,581.90/x
3. Step 3: Cross multiply
   2,526.50x = 3,485.58 × 1,581.90
4. Step 4: Simplify right side
   2,526.50x = 5,513,839.00
5. Step 5: Solve for x
   x = 5,513,839.00/2,526.50
6. Step 6: Final answer
   x = 2,182.40