Finding the Fourth Proportional to 81,239.34, 112,120.71 and 45,431.34

Step by Step Solution

1. Step 1: Write the proportion equation
   81,239.34 : 112,120.71 = 45,431.34 : x
2. Step 2: Convert to fraction form
   81,239.34/112,120.71 = 45,431.34/x
3. Step 3: Cross multiply
   81,239.34x = 112,120.71 × 45,431.34
4. Step 4: Simplify right side
   81,239.34x = 5,093,794,097.05
5. Step 5: Solve for x
   x = 5,093,794,097.05/81,239.34
6. Step 6: Final answer
   x = 62,701.08