Finding the Fourth Proportional to 1,092.45, 1,507.65 and 620.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.45 : 1,507.65 = 620.37 : x
2. Step 2: Convert to fraction form
   1,092.45/1,507.65 = 620.37/x
3. Step 3: Cross multiply
   1,092.45x = 1,507.65 × 620.37
4. Step 4: Simplify right side
   1,092.45x = 935,300.83
5. Step 5: Solve for x
   x = 935,300.83/1,092.45
6. Step 6: Final answer
   x = 856.15