Finding the Fourth Proportional to 128,667.88, 192,880.86 and 69,414.76

Step by Step Solution

1. Step 1: Write the proportion equation
   128,667.88 : 192,880.86 = 69,414.76 : x
2. Step 2: Convert to fraction form
   128,667.88/192,880.86 = 69,414.76/x
3. Step 3: Cross multiply
   128,667.88x = 192,880.86 × 69,414.76
4. Step 4: Simplify right side
   128,667.88x = 13,388,778,605.49
5. Step 5: Solve for x
   x = 13,388,778,605.49/128,667.88
6. Step 6: Final answer
   x = 104,056.88