Finding the Fourth Proportional to 1,445.95, 2,171.61 and 753.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.95 : 2,171.61 = 753.10 : x
2. Step 2: Convert to fraction form
   1,445.95/2,171.61 = 753.10/x
3. Step 3: Cross multiply
   1,445.95x = 2,171.61 × 753.10
4. Step 4: Simplify right side
   1,445.95x = 1,635,434.06
5. Step 5: Solve for x
   x = 1,635,434.06/1,445.95
6. Step 6: Final answer
   x = 1,131.04