Finding the Fourth Proportional to 2,240.47, 3,091.91 and 1,355.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240.47 : 3,091.91 = 1,355.76 : x
2. Step 2: Convert to fraction form
   2,240.47/3,091.91 = 1,355.76/x
3. Step 3: Cross multiply
   2,240.47x = 3,091.91 × 1,355.76
4. Step 4: Simplify right side
   2,240.47x = 4,191,887.90
5. Step 5: Solve for x
   x = 4,191,887.90/2,240.47
6. Step 6: Final answer
   x = 1,870.99