Finding the Fourth Proportional to 2,387.95, 3,293.61 and 1,393.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.95 : 3,293.61 = 1,393.17 : x
2. Step 2: Convert to fraction form
   2,387.95/3,293.61 = 1,393.17/x
3. Step 3: Cross multiply
   2,387.95x = 3,293.61 × 1,393.17
4. Step 4: Simplify right side
   2,387.95x = 4,588,548.90
5. Step 5: Solve for x
   x = 4,588,548.90/2,387.95
6. Step 6: Final answer
   x = 1,921.55