Finding the Fourth Proportional to 112,020.82, 154,484.88 and 81,758.20

Step by Step Solution

1. Step 1: Write the proportion equation
   112,020.82 : 154,484.88 = 81,758.20 : x
2. Step 2: Convert to fraction form
   112,020.82/154,484.88 = 81,758.20/x
3. Step 3: Cross multiply
   112,020.82x = 154,484.88 × 81,758.20
4. Step 4: Simplify right side
   112,020.82x = 12,630,405,716.02
5. Step 5: Solve for x
   x = 12,630,405,716.02/112,020.82
6. Step 6: Final answer
   x = 112,750.52