Finding the Fourth Proportional to 81,429.68, 112,371 and 45,621.20

Step by Step Solution

1. Step 1: Write the proportion equation
   81,429.68 : 112,371 = 45,621.20 : x
2. Step 2: Convert to fraction form
   81,429.68/112,371 = 45,621.20/x
3. Step 3: Cross multiply
   81,429.68x = 112,371 × 45,621.20
4. Step 4: Simplify right side
   81,429.68x = 5,126,499,865.20
5. Step 5: Solve for x
   x = 5,126,499,865.20/81,429.68
6. Step 6: Final answer
   x = 62,956.16