Finding the Fourth Proportional to 2,591.29, 3,886.48 and 948.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.29 : 3,886.48 = 948.31 : x
2. Step 2: Convert to fraction form
   2,591.29/3,886.48 = 948.31/x
3. Step 3: Cross multiply
   2,591.29x = 3,886.48 × 948.31
4. Step 4: Simplify right side
   2,591.29x = 3,685,579.32
5. Step 5: Solve for x
   x = 3,685,579.32/2,591.29
6. Step 6: Final answer
   x = 1,422.29