Finding the Fourth Proportional to 9,105.70, 12,773.90 and 9,105.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,105.70 : 12,773.90 = 9,105.70 : x
2. Step 2: Convert to fraction form
   9,105.70/12,773.90 = 9,105.70/x
3. Step 3: Cross multiply
   9,105.70x = 12,773.90 × 9,105.70
4. Step 4: Simplify right side
   9,105.70x = 116,315,301.23
5. Step 5: Solve for x
   x = 116,315,301.23/9,105.70
6. Step 6: Final answer
   x = 12,773.90