Finding the Fourth Proportional to 128,759, 192,913.29 and 89,341.16

Step by Step Solution

1. Step 1: Write the proportion equation
   128,759 : 192,913.29 = 89,341.16 : x
2. Step 2: Convert to fraction form
   128,759/192,913.29 = 89,341.16/x
3. Step 3: Cross multiply
   128,759x = 192,913.29 × 89,341.16
4. Step 4: Simplify right side
   128,759x = 17,235,097,108.02
5. Step 5: Solve for x
   x = 17,235,097,108.02/128,759
6. Step 6: Final answer
   x = 133,855.48