Finding the Fourth Proportional to 1,092.49, 1,507.61 and 620.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.49 : 1,507.61 = 620.48 : x
2. Step 2: Convert to fraction form
   1,092.49/1,507.61 = 620.48/x
3. Step 3: Cross multiply
   1,092.49x = 1,507.61 × 620.48
4. Step 4: Simplify right side
   1,092.49x = 935,438.69
5. Step 5: Solve for x
   x = 935,438.69/1,092.49
6. Step 6: Final answer
   x = 856.25