Finding the Fourth Proportional to 1,978.34, 2,967.53 and 1,918.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.34 : 2,967.53 = 1,918.17 : x
2. Step 2: Convert to fraction form
   1,978.34/2,967.53 = 1,918.17/x
3. Step 3: Cross multiply
   1,978.34x = 2,967.53 × 1,918.17
4. Step 4: Simplify right side
   1,978.34x = 5,692,217.43
5. Step 5: Solve for x
   x = 5,692,217.43/1,978.34
6. Step 6: Final answer
   x = 2,877.28