Finding the Fourth Proportional to 13,062.72, 18,061.98 and 12,851.70

Step by Step Solution

1. Step 1: Write the proportion equation
   13,062.72 : 18,061.98 = 12,851.70 : x
2. Step 2: Convert to fraction form
   13,062.72/18,061.98 = 12,851.70/x
3. Step 3: Cross multiply
   13,062.72x = 18,061.98 × 12,851.70
4. Step 4: Simplify right side
   13,062.72x = 232,127,148.37
5. Step 5: Solve for x
   x = 232,127,148.37/13,062.72
6. Step 6: Final answer
   x = 17,770.20