Finding the Fourth Proportional to 22,945.10, 34,427.97 and 12,402.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,945.10 : 34,427.97 = 12,402.78 : x
2. Step 2: Convert to fraction form
   22,945.10/34,427.97 = 12,402.78/x
3. Step 3: Cross multiply
   22,945.10x = 34,427.97 × 12,402.78
4. Step 4: Simplify right side
   22,945.10x = 427,002,483.76
5. Step 5: Solve for x
   x = 427,002,483.76/22,945.10
6. Step 6: Final answer
   x = 18,609.75