Finding the Fourth Proportional to 9,401.10, 13,190.70 and 9,401.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,401.10 : 13,190.70 = 9,401.10 : x
2. Step 2: Convert to fraction form
   9,401.10/13,190.70 = 9,401.10/x
3. Step 3: Cross multiply
   9,401.10x = 13,190.70 × 9,401.10
4. Step 4: Simplify right side
   9,401.10x = 124,007,089.77
5. Step 5: Solve for x
   x = 124,007,089.77/9,401.10
6. Step 6: Final answer
   x = 13,190.70