Finding the Fourth Proportional to 107,705.48, 161,597.10 and 55,139.72

Step by Step Solution

1. Step 1: Write the proportion equation
   107,705.48 : 161,597.10 = 55,139.72 : x
2. Step 2: Convert to fraction form
   107,705.48/161,597.10 = 55,139.72/x
3. Step 3: Cross multiply
   107,705.48x = 161,597.10 × 55,139.72
4. Step 4: Simplify right side
   107,705.48x = 8,910,418,846.81
5. Step 5: Solve for x
   x = 8,910,418,846.81/107,705.48
6. Step 6: Final answer
   x = 82,729.48