Finding the Fourth Proportional to 144,869.72, 199,931.29 and 91,200.74

Step by Step Solution

1. Step 1: Write the proportion equation
   144,869.72 : 199,931.29 = 91,200.74 : x
2. Step 2: Convert to fraction form
   144,869.72/199,931.29 = 91,200.74/x
3. Step 3: Cross multiply
   144,869.72x = 199,931.29 × 91,200.74
4. Step 4: Simplify right side
   144,869.72x = 18,233,880,369.50
5. Step 5: Solve for x
   x = 18,233,880,369.50/144,869.72
6. Step 6: Final answer
   x = 125,863.99