Finding the Fourth Proportional to 10,390.78, 14,340.05 and 5,915.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,390.78 : 14,340.05 = 5,915.98 : x
2. Step 2: Convert to fraction form
   10,390.78/14,340.05 = 5,915.98/x
3. Step 3: Cross multiply
   10,390.78x = 14,340.05 × 5,915.98
4. Step 4: Simplify right side
   10,390.78x = 84,835,419.42
5. Step 5: Solve for x
   x = 84,835,419.42/10,390.78
6. Step 6: Final answer
   x = 8,164.49