Finding the Fourth Proportional to 144,891.72, 217,389 and 64,923.40

Step by Step Solution

1. Step 1: Write the proportion equation
   144,891.72 : 217,389 = 64,923.40 : x
2. Step 2: Convert to fraction form
   144,891.72/217,389 = 64,923.40/x
3. Step 3: Cross multiply
   144,891.72x = 217,389 × 64,923.40
4. Step 4: Simplify right side
   144,891.72x = 14,113,633,002.60
5. Step 5: Solve for x
   x = 14,113,633,002.60/144,891.72
6. Step 6: Final answer
   x = 97,408.14