Finding the Fourth Proportional to 81,290.76, 112,143.36 and 52,619.67

Step by Step Solution

1. Step 1: Write the proportion equation
   81,290.76 : 112,143.36 = 52,619.67 : x
2. Step 2: Convert to fraction form
   81,290.76/112,143.36 = 52,619.67/x
3. Step 3: Cross multiply
   81,290.76x = 112,143.36 × 52,619.67
4. Step 4: Simplify right side
   81,290.76x = 5,900,946,595.89
5. Step 5: Solve for x
   x = 5,900,946,595.89/81,290.76
6. Step 6: Final answer
   x = 72,590.62