Finding the Fourth Proportional to 12,477.91, 17,213.31 and 7,438.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,477.91 : 17,213.31 = 7,438.58 : x
2. Step 2: Convert to fraction form
   12,477.91/17,213.31 = 7,438.58/x
3. Step 3: Cross multiply
   12,477.91x = 17,213.31 × 7,438.58
4. Step 4: Simplify right side
   12,477.91x = 128,042,579.01
5. Step 5: Solve for x
   x = 128,042,579.01/12,477.91
6. Step 6: Final answer
   x = 10,261.54