Finding the Fourth Proportional to 1,507.81, 2,081.51 and 948.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.81 : 2,081.51 = 948.55 : x
2. Step 2: Convert to fraction form
   1,507.81/2,081.51 = 948.55/x
3. Step 3: Cross multiply
   1,507.81x = 2,081.51 × 948.55
4. Step 4: Simplify right side
   1,507.81x = 1,974,411.57
5. Step 5: Solve for x
   x = 1,974,411.57/1,507.81
6. Step 6: Final answer
   x = 1,309.46