Finding the Fourth Proportional to 10,621.90, 14,656.80 and 5,905.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,621.90 : 14,656.80 = 5,905.27 : x
2. Step 2: Convert to fraction form
   10,621.90/14,656.80 = 5,905.27/x
3. Step 3: Cross multiply
   10,621.90x = 14,656.80 × 5,905.27
4. Step 4: Simplify right side
   10,621.90x = 86,552,361.34
5. Step 5: Solve for x
   x = 86,552,361.34/10,621.90
6. Step 6: Final answer
   x = 8,148.48