Finding the Fourth Proportional to 10,978.01, 15,151.89 and 7,442.36

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.01 : 15,151.89 = 7,442.36 : x
2. Step 2: Convert to fraction form
   10,978.01/15,151.89 = 7,442.36/x
3. Step 3: Cross multiply
   10,978.01x = 15,151.89 × 7,442.36
4. Step 4: Simplify right side
   10,978.01x = 112,765,744.30
5. Step 5: Solve for x
   x = 112,765,744.30/10,978.01
6. Step 6: Final answer
   x = 10,271.97