Finding the Fourth Proportional to 89,573.72, 134,249.54 and 78,501.96

Step by Step Solution

1. Step 1: Write the proportion equation
   89,573.72 : 134,249.54 = 78,501.96 : x
2. Step 2: Convert to fraction form
   89,573.72/134,249.54 = 78,501.96/x
3. Step 3: Cross multiply
   89,573.72x = 134,249.54 × 78,501.96
4. Step 4: Simplify right side
   89,573.72x = 10,538,851,626.59
5. Step 5: Solve for x
   x = 10,538,851,626.59/89,573.72
6. Step 6: Final answer
   x = 117,655.63