Finding the Fourth Proportional to 9,062.06, 12,486.48 and 8,438.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,062.06 : 12,486.48 = 8,438.72 : x
2. Step 2: Convert to fraction form
   9,062.06/12,486.48 = 8,438.72/x
3. Step 3: Cross multiply
   9,062.06x = 12,486.48 × 8,438.72
4. Step 4: Simplify right side
   9,062.06x = 105,369,908.51
5. Step 5: Solve for x
   x = 105,369,908.51/9,062.06
6. Step 6: Final answer
   x = 11,627.59