Finding the Fourth Proportional to 89,224.89, 134,003.75 and 78,555.03

Step by Step Solution

1. Step 1: Write the proportion equation
   89,224.89 : 134,003.75 = 78,555.03 : x
2. Step 2: Convert to fraction form
   89,224.89/134,003.75 = 78,555.03/x
3. Step 3: Cross multiply
   89,224.89x = 134,003.75 × 78,555.03
4. Step 4: Simplify right side
   89,224.89x = 10,526,668,208.59
5. Step 5: Solve for x
   x = 10,526,668,208.59/89,224.89
6. Step 6: Final answer
   x = 117,979.06