Finding the Fourth Proportional to 1,978.82, 2,731.11 and 1,140.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.82 : 2,731.11 = 1,140.01 : x
2. Step 2: Convert to fraction form
   1,978.82/2,731.11 = 1,140.01/x
3. Step 3: Cross multiply
   1,978.82x = 2,731.11 × 1,140.01
4. Step 4: Simplify right side
   1,978.82x = 3,113,481.61
5. Step 5: Solve for x
   x = 3,113,481.61/1,978.82
6. Step 6: Final answer
   x = 1,573.40