Finding the Fourth Proportional to 85,423.72, 117,853.50 and 53,581

Step by Step Solution

1. Step 1: Write the proportion equation
   85,423.72 : 117,853.50 = 53,581 : x
2. Step 2: Convert to fraction form
   85,423.72/117,853.50 = 53,581/x
3. Step 3: Cross multiply
   85,423.72x = 117,853.50 × 53,581
4. Step 4: Simplify right side
   85,423.72x = 6,314,708,383.50
5. Step 5: Solve for x
   x = 6,314,708,383.50/85,423.72
6. Step 6: Final answer
   x = 73,922.19