Finding the Fourth Proportional to 78,711.81, 108,536.55 and 53,173.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78,711.81 : 108,536.55 = 53,173.83 : x
2. Step 2: Convert to fraction form
   78,711.81/108,536.55 = 53,173.83/x
3. Step 3: Cross multiply
   78,711.81x = 108,536.55 × 53,173.83
4. Step 4: Simplify right side
   78,711.81x = 5,771,304,058.49
5. Step 5: Solve for x
   x = 5,771,304,058.49/78,711.81
6. Step 6: Final answer
   x = 73,321.96