Finding the Fourth Proportional to 112,019.82, 154,483.50 and 81,757.20

Step by Step Solution

1. Step 1: Write the proportion equation
   112,019.82 : 154,483.50 = 81,757.20 : x
2. Step 2: Convert to fraction form
   112,019.82/154,483.50 = 81,757.20/x
3. Step 3: Cross multiply
   112,019.82x = 154,483.50 × 81,757.20
4. Step 4: Simplify right side
   112,019.82x = 12,630,138,406.20
5. Step 5: Solve for x
   x = 12,630,138,406.20/112,019.82
6. Step 6: Final answer
   x = 112,749.14