Finding the Fourth Proportional to 82,447.15, 123,680.58 and 29,128.09

Step by Step Solution

1. Step 1: Write the proportion equation
   82,447.15 : 123,680.58 = 29,128.09 : x
2. Step 2: Convert to fraction form
   82,447.15/123,680.58 = 29,128.09/x
3. Step 3: Cross multiply
   82,447.15x = 123,680.58 × 29,128.09
4. Step 4: Simplify right side
   82,447.15x = 3,602,579,065.49
5. Step 5: Solve for x
   x = 3,602,579,065.49/82,447.15
6. Step 6: Final answer
   x = 43,695.62