Finding the Fourth Proportional to 7,317.78, 10,978.29 and 2,123.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,317.78 : 10,978.29 = 2,123.34 : x
2. Step 2: Convert to fraction form
   7,317.78/10,978.29 = 2,123.34/x
3. Step 3: Cross multiply
   7,317.78x = 10,978.29 × 2,123.34
4. Step 4: Simplify right side
   7,317.78x = 23,310,642.29
5. Step 5: Solve for x
   x = 23,310,642.29/7,317.78
6. Step 6: Final answer
   x = 3,185.48