Finding the Fourth Proportional to 1,990.79, 2,985.34 and 757.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.79 : 2,985.34 = 757.52 : x
2. Step 2: Convert to fraction form
   1,990.79/2,985.34 = 757.52/x
3. Step 3: Cross multiply
   1,990.79x = 2,985.34 × 757.52
4. Step 4: Simplify right side
   1,990.79x = 2,261,454.76
5. Step 5: Solve for x
   x = 2,261,454.76/1,990.79
6. Step 6: Final answer
   x = 1,135.96