Finding the Fourth Proportional to 81,290.82, 112,185.69 and 45,478.69

Step by Step Solution

1. Step 1: Write the proportion equation
   81,290.82 : 112,185.69 = 45,478.69 : x
2. Step 2: Convert to fraction form
   81,290.82/112,185.69 = 45,478.69/x
3. Step 3: Cross multiply
   81,290.82x = 112,185.69 × 45,478.69
4. Step 4: Simplify right side
   81,290.82x = 5,102,058,217.95
5. Step 5: Solve for x
   x = 5,102,058,217.95/81,290.82
6. Step 6: Final answer
   x = 62,763.03