Finding the Fourth Proportional to 144,946.72, 199,941.52 and 91,146.40

Step by Step Solution

1. Step 1: Write the proportion equation
   144,946.72 : 199,941.52 = 91,146.40 : x
2. Step 2: Convert to fraction form
   144,946.72/199,941.52 = 91,146.40/x
3. Step 3: Cross multiply
   144,946.72x = 199,941.52 × 91,146.40
4. Step 4: Simplify right side
   144,946.72x = 18,223,949,758.53
5. Step 5: Solve for x
   x = 18,223,949,758.53/144,946.72
6. Step 6: Final answer
   x = 125,728.61