Finding the Fourth Proportional to 81,208.72, 112,067.52 and 45,398.56

Step by Step Solution

1. Step 1: Write the proportion equation
   81,208.72 : 112,067.52 = 45,398.56 : x
2. Step 2: Convert to fraction form
   81,208.72/112,067.52 = 45,398.56/x
3. Step 3: Cross multiply
   81,208.72x = 112,067.52 × 45,398.56
4. Step 4: Simplify right side
   81,208.72x = 5,087,704,030.77
5. Step 5: Solve for x
   x = 5,087,704,030.77/81,208.72
6. Step 6: Final answer
   x = 62,649.73