Finding the Fourth Proportional to 82,401.05, 113,671.72 and 52,135.40

Step by Step Solution

1. Step 1: Write the proportion equation
   82,401.05 : 113,671.72 = 52,135.40 : x
2. Step 2: Convert to fraction form
   82,401.05/113,671.72 = 52,135.40/x
3. Step 3: Cross multiply
   82,401.05x = 113,671.72 × 52,135.40
4. Step 4: Simplify right side
   82,401.05x = 5,926,320,590.89
5. Step 5: Solve for x
   x = 5,926,320,590.89/82,401.05
6. Step 6: Final answer
   x = 71,920.45