Finding the Fourth Proportional to 10,307.78, 15,464.74 and 7,311.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,307.78 : 15,464.74 = 7,311.59 : x
2. Step 2: Convert to fraction form
   10,307.78/15,464.74 = 7,311.59/x
3. Step 3: Cross multiply
   10,307.78x = 15,464.74 × 7,311.59
4. Step 4: Simplify right side
   10,307.78x = 113,071,761.01
5. Step 5: Solve for x
   x = 113,071,761.01/10,307.78
6. Step 6: Final answer
   x = 10,969.56