Finding the Fourth Proportional to 262,498.86, 393,494.76 and 84,885.30

Step by Step Solution

1. Step 1: Write the proportion equation
   262,498.86 : 393,494.76 = 84,885.30 : x
2. Step 2: Convert to fraction form
   262,498.86/393,494.76 = 84,885.30/x
3. Step 3: Cross multiply
   262,498.86x = 393,494.76 × 84,885.30
4. Step 4: Simplify right side
   262,498.86x = 33,401,920,751.03
5. Step 5: Solve for x
   x = 33,401,920,751.03/262,498.86
6. Step 6: Final answer
   x = 127,245.96