Finding the Fourth Proportional to 1,978.22, 2,965.24 and 745.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.22 : 2,965.24 = 745.10 : x
2. Step 2: Convert to fraction form
   1,978.22/2,965.24 = 745.10/x
3. Step 3: Cross multiply
   1,978.22x = 2,965.24 × 745.10
4. Step 4: Simplify right side
   1,978.22x = 2,209,397.55
5. Step 5: Solve for x
   x = 2,209,397.55/1,978.22
6. Step 6: Final answer
   x = 1,116.86