Finding the Fourth Proportional to 1,779.15, 2,666.57 and 1,259.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,779.15 : 2,666.57 = 1,259.31 : x
2. Step 2: Convert to fraction form
   1,779.15/2,666.57 = 1,259.31/x
3. Step 3: Cross multiply
   1,779.15x = 2,666.57 × 1,259.31
4. Step 4: Simplify right side
   1,779.15x = 3,358,038.27
5. Step 5: Solve for x
   x = 3,358,038.27/1,779.15
6. Step 6: Final answer
   x = 1,887.44