Finding the Fourth Proportional to 2,087.34, 3,130.94 and 992.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.34 : 3,130.94 = 992.50 : x
2. Step 2: Convert to fraction form
   2,087.34/3,130.94 = 992.50/x
3. Step 3: Cross multiply
   2,087.34x = 3,130.94 × 992.50
4. Step 4: Simplify right side
   2,087.34x = 3,107,457.95
5. Step 5: Solve for x
   x = 3,107,457.95/2,087.34
6. Step 6: Final answer
   x = 1,488.72