Finding the Fourth Proportional to 9,089.30, 12,742.30 and 9,089.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,089.30 : 12,742.30 = 9,089.30 : x
2. Step 2: Convert to fraction form
   9,089.30/12,742.30 = 9,089.30/x
3. Step 3: Cross multiply
   9,089.30x = 12,742.30 × 9,089.30
4. Step 4: Simplify right side
   9,089.30x = 115,818,587.39
5. Step 5: Solve for x
   x = 115,818,587.39/9,089.30
6. Step 6: Final answer
   x = 12,742.30