Finding the Fourth Proportional to 1,985.25, 2,978.01 and 752.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.25 : 2,978.01 = 752.43 : x
2. Step 2: Convert to fraction form
   1,985.25/2,978.01 = 752.43/x
3. Step 3: Cross multiply
   1,985.25x = 2,978.01 × 752.43
4. Step 4: Simplify right side
   1,985.25x = 2,240,744.06
5. Step 5: Solve for x
   x = 2,240,744.06/1,985.25
6. Step 6: Final answer
   x = 1,128.70