Finding the Fourth Proportional to 1,453.80, 2,177.82 and 939.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,453.80 : 2,177.82 = 939.72 : x
2. Step 2: Convert to fraction form
   1,453.80/2,177.82 = 939.72/x
3. Step 3: Cross multiply
   1,453.80x = 2,177.82 × 939.72
4. Step 4: Simplify right side
   1,453.80x = 2,046,541.01
5. Step 5: Solve for x
   x = 2,046,541.01/1,453.80
6. Step 6: Final answer
   x = 1,407.72