Finding the Fourth Proportional to 2,455.31, 3,681.54 and 992.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,455.31 : 3,681.54 = 992.72 : x
2. Step 2: Convert to fraction form
   2,455.31/3,681.54 = 992.72/x
3. Step 3: Cross multiply
   2,455.31x = 3,681.54 × 992.72
4. Step 4: Simplify right side
   2,455.31x = 3,654,719.98
5. Step 5: Solve for x
   x = 3,654,719.98/2,455.31
6. Step 6: Final answer
   x = 1,488.50