Finding the Fourth Proportional to 2,591.28, 3,887.51 and 947.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.28 : 3,887.51 = 947.82 : x
2. Step 2: Convert to fraction form
   2,591.28/3,887.51 = 947.82/x
3. Step 3: Cross multiply
   2,591.28x = 3,887.51 × 947.82
4. Step 4: Simplify right side
   2,591.28x = 3,684,659.73
5. Step 5: Solve for x
   x = 3,684,659.73/2,591.28
6. Step 6: Final answer
   x = 1,421.95