Finding the Fourth Proportional to 1,092.47, 1,507.32 and 620.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.47 : 1,507.32 = 620.37 : x
2. Step 2: Convert to fraction form
   1,092.47/1,507.32 = 620.37/x
3. Step 3: Cross multiply
   1,092.47x = 1,507.32 × 620.37
4. Step 4: Simplify right side
   1,092.47x = 935,096.11
5. Step 5: Solve for x
   x = 935,096.11/1,092.47
6. Step 6: Final answer
   x = 855.95