Finding the Fourth Proportional to 82,520, 113,892 and 48,985.28

Step by Step Solution

1. Step 1: Write the proportion equation
   82,520 : 113,892 = 48,985.28 : x
2. Step 2: Convert to fraction form
   82,520/113,892 = 48,985.28/x
3. Step 3: Cross multiply
   82,520x = 113,892 × 48,985.28
4. Step 4: Simplify right side
   82,520x = 5,579,031,509.76
5. Step 5: Solve for x
   x = 5,579,031,509.76/82,520
6. Step 6: Final answer
   x = 67,608.23