Finding the Fourth Proportional to 2,191.91, 3,024.47 and 1,307.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.91 : 3,024.47 = 1,307.39 : x
2. Step 2: Convert to fraction form
   2,191.91/3,024.47 = 1,307.39/x
3. Step 3: Cross multiply
   2,191.91x = 3,024.47 × 1,307.39
4. Step 4: Simplify right side
   2,191.91x = 3,954,140.17
5. Step 5: Solve for x
   x = 3,954,140.17/2,191.91
6. Step 6: Final answer
   x = 1,803.97