Finding the Fourth Proportional to 34,017.42, 51,019.98 and 12,666.15

Step by Step Solution

1. Step 1: Write the proportion equation
   34,017.42 : 51,019.98 = 12,666.15 : x
2. Step 2: Convert to fraction form
   34,017.42/51,019.98 = 12,666.15/x
3. Step 3: Cross multiply
   34,017.42x = 51,019.98 × 12,666.15
4. Step 4: Simplify right side
   34,017.42x = 646,226,528.69
5. Step 5: Solve for x
   x = 646,226,528.69/34,017.42
6. Step 6: Final answer
   x = 18,996.93