Finding the Fourth Proportional to 2,086.88, 3,129.57 and 916.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.88 : 3,129.57 = 916.54 : x
2. Step 2: Convert to fraction form
   2,086.88/3,129.57 = 916.54/x
3. Step 3: Cross multiply
   2,086.88x = 3,129.57 × 916.54
4. Step 4: Simplify right side
   2,086.88x = 2,868,368.26
5. Step 5: Solve for x
   x = 2,868,368.26/2,086.88
6. Step 6: Final answer
   x = 1,374.48