Finding the Fourth Proportional to 105,200.22, 157,507.53 and 81,872.22

Step by Step Solution

1. Step 1: Write the proportion equation
   105,200.22 : 157,507.53 = 81,872.22 : x
2. Step 2: Convert to fraction form
   105,200.22/157,507.53 = 81,872.22/x
3. Step 3: Cross multiply
   105,200.22x = 157,507.53 × 81,872.22
4. Step 4: Simplify right side
   105,200.22x = 12,895,491,147.82
5. Step 5: Solve for x
   x = 12,895,491,147.82/105,200.22
6. Step 6: Final answer
   x = 122,580.46