Finding the Fourth Proportional to 1,453.57, 2,178.42 and 760.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,453.57 : 2,178.42 = 760.81 : x
2. Step 2: Convert to fraction form
   1,453.57/2,178.42 = 760.81/x
3. Step 3: Cross multiply
   1,453.57x = 2,178.42 × 760.81
4. Step 4: Simplify right side
   1,453.57x = 1,657,363.72
5. Step 5: Solve for x
   x = 1,657,363.72/1,453.57
6. Step 6: Final answer
   x = 1,140.20