Finding the Fourth Proportional to 1,515.61, 2,092.43 and 992.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,515.61 : 2,092.43 = 992.55 : x
2. Step 2: Convert to fraction form
   1,515.61/2,092.43 = 992.55/x
3. Step 3: Cross multiply
   1,515.61x = 2,092.43 × 992.55
4. Step 4: Simplify right side
   1,515.61x = 2,076,851.72
5. Step 5: Solve for x
   x = 2,076,851.72/1,515.61
6. Step 6: Final answer
   x = 1,370.31