Finding the Fourth Proportional to 53,171.55, 73,381.91 and 39,719.45

Step by Step Solution

1. Step 1: Write the proportion equation
   53,171.55 : 73,381.91 = 39,719.45 : x
2. Step 2: Convert to fraction form
   53,171.55/73,381.91 = 39,719.45/x
3. Step 3: Cross multiply
   53,171.55x = 73,381.91 × 39,719.45
4. Step 4: Simplify right side
   53,171.55x = 2,914,689,105.15
5. Step 5: Solve for x
   x = 2,914,689,105.15/53,171.55
6. Step 6: Final answer
   x = 54,816.70