Finding the Fourth Proportional to 1,877.28, 2,588.96 and 1,279.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,877.28 : 2,588.96 = 1,279.50 : x
2. Step 2: Convert to fraction form
   1,877.28/2,588.96 = 1,279.50/x
3. Step 3: Cross multiply
   1,877.28x = 2,588.96 × 1,279.50
4. Step 4: Simplify right side
   1,877.28x = 3,312,567.81
5. Step 5: Solve for x
   x = 3,312,567.81/1,877.28
6. Step 6: Final answer
   x = 1,764.56