Finding the Fourth Proportional to 85,769.98, 128,655.27 and 60,734.29

Step by Step Solution

1. Step 1: Write the proportion equation
   85,769.98 : 128,655.27 = 60,734.29 : x
2. Step 2: Convert to fraction form
   85,769.98/128,655.27 = 60,734.29/x
3. Step 3: Cross multiply
   85,769.98x = 128,655.27 × 60,734.29
4. Step 4: Simplify right side
   85,769.98x = 7,813,786,478.21
5. Step 5: Solve for x
   x = 7,813,786,478.21/85,769.98
6. Step 6: Final answer
   x = 91,101.65