Finding the Fourth Proportional to 89,062.71, 133,684.09 and 78,997.09

Step by Step Solution

1. Step 1: Write the proportion equation
   89,062.71 : 133,684.09 = 78,997.09 : x
2. Step 2: Convert to fraction form
   89,062.71/133,684.09 = 78,997.09/x
3. Step 3: Cross multiply
   89,062.71x = 133,684.09 × 78,997.09
4. Step 4: Simplify right side
   89,062.71x = 10,560,653,958.87
5. Step 5: Solve for x
   x = 10,560,653,958.87/89,062.71
6. Step 6: Final answer
   x = 118,575.48