Finding the Fourth Proportional to 13,718.38, 18,931.50 and 7,430.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,718.38 : 18,931.50 = 7,430.89 : x
2. Step 2: Convert to fraction form
   13,718.38/18,931.50 = 7,430.89/x
3. Step 3: Cross multiply
   13,718.38x = 18,931.50 × 7,430.89
4. Step 4: Simplify right side
   13,718.38x = 140,677,799.38
5. Step 5: Solve for x
   x = 140,677,799.38/13,718.38
6. Step 6: Final answer
   x = 10,254.70