Finding the Fourth Proportional to 71,438.16, 107,146.71 and 18,851.34

Step by Step Solution

1. Step 1: Write the proportion equation
   71,438.16 : 107,146.71 = 18,851.34 : x
2. Step 2: Convert to fraction form
   71,438.16/107,146.71 = 18,851.34/x
3. Step 3: Cross multiply
   71,438.16x = 107,146.71 × 18,851.34
4. Step 4: Simplify right side
   71,438.16x = 2,019,859,060.09
5. Step 5: Solve for x
   x = 2,019,859,060.09/71,438.16
6. Step 6: Final answer
   x = 28,274.23