Finding the Fourth Proportional to 9,030.74, 12,434.72 and 7,905.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,030.74 : 12,434.72 = 7,905.38 : x
2. Step 2: Convert to fraction form
   9,030.74/12,434.72 = 7,905.38/x
3. Step 3: Cross multiply
   9,030.74x = 12,434.72 × 7,905.38
4. Step 4: Simplify right side
   9,030.74x = 98,301,186.79
5. Step 5: Solve for x
   x = 98,301,186.79/9,030.74
6. Step 6: Final answer
   x = 10,885.18