Finding the Fourth Proportional to 107,724.96, 161,656.56 and 52,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   107,724.96 : 161,656.56 = 52,290.72 : x
2. Step 2: Convert to fraction form
   107,724.96/161,656.56 = 52,290.72/x
3. Step 3: Cross multiply
   107,724.96x = 161,656.56 × 52,290.72
4. Step 4: Simplify right side
   107,724.96x = 8,453,137,915.12
5. Step 5: Solve for x
   x = 8,453,137,915.12/107,724.96
6. Step 6: Final answer
   x = 78,469.63