Finding the Fourth Proportional to 1,526.86, 2,105.67 and 1,291.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,526.86 : 2,105.67 = 1,291.30 : x
2. Step 2: Convert to fraction form
   1,526.86/2,105.67 = 1,291.30/x
3. Step 3: Cross multiply
   1,526.86x = 2,105.67 × 1,291.30
4. Step 4: Simplify right side
   1,526.86x = 2,719,049.10
5. Step 5: Solve for x
   x = 2,719,049.10/1,526.86
6. Step 6: Final answer
   x = 1,780.82