Finding the Fourth Proportional to 9,423.60, 12,492.78 and 9,423.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,423.60 : 12,492.78 = 9,423.60 : x
2. Step 2: Convert to fraction form
   9,423.60/12,492.78 = 9,423.60/x
3. Step 3: Cross multiply
   9,423.60x = 12,492.78 × 9,423.60
4. Step 4: Simplify right side
   9,423.60x = 117,726,961.61
5. Step 5: Solve for x
   x = 117,726,961.61/9,423.60
6. Step 6: Final answer
   x = 12,492.78