Finding the Fourth Proportional to 71,676.21, 107,931.01 and 53,088.15

Step by Step Solution

1. Step 1: Write the proportion equation
   71,676.21 : 107,931.01 = 53,088.15 : x
2. Step 2: Convert to fraction form
   71,676.21/107,931.01 = 53,088.15/x
3. Step 3: Cross multiply
   71,676.21x = 107,931.01 × 53,088.15
4. Step 4: Simplify right side
   71,676.21x = 5,729,857,648.53
5. Step 5: Solve for x
   x = 5,729,857,648.53/71,676.21
6. Step 6: Final answer
   x = 79,940.86