Finding the Fourth Proportional to 2,700.78, 4,050.63 and 753.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,700.78 : 4,050.63 = 753.12 : x
2. Step 2: Convert to fraction form
   2,700.78/4,050.63 = 753.12/x
3. Step 3: Cross multiply
   2,700.78x = 4,050.63 × 753.12
4. Step 4: Simplify right side
   2,700.78x = 3,050,610.47
5. Step 5: Solve for x
   x = 3,050,610.47/2,700.78
6. Step 6: Final answer
   x = 1,129.53