Finding the Fourth Proportional to 1,985.38, 2,978.98 and 753.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.38 : 2,978.98 = 753.17 : x
2. Step 2: Convert to fraction form
   1,985.38/2,978.98 = 753.17/x
3. Step 3: Cross multiply
   1,985.38x = 2,978.98 × 753.17
4. Step 4: Simplify right side
   1,985.38x = 2,243,661.59
5. Step 5: Solve for x
   x = 2,243,661.59/1,985.38
6. Step 6: Final answer
   x = 1,130.09