Finding the Fourth Proportional to 1,527.09, 2,105.52 and 1,290.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,527.09 : 2,105.52 = 1,290.62 : x
2. Step 2: Convert to fraction form
   1,527.09/2,105.52 = 1,290.62/x
3. Step 3: Cross multiply
   1,527.09x = 2,105.52 × 1,290.62
4. Step 4: Simplify right side
   1,527.09x = 2,717,415.69
5. Step 5: Solve for x
   x = 2,717,415.69/1,527.09
6. Step 6: Final answer
   x = 1,779.47