Finding the Fourth Proportional to 144,947.72, 199,942.90 and 91,147.40

Step by Step Solution

1. Step 1: Write the proportion equation
   144,947.72 : 199,942.90 = 91,147.40 : x
2. Step 2: Convert to fraction form
   144,947.72/199,942.90 = 91,147.40/x
3. Step 3: Cross multiply
   144,947.72x = 199,942.90 × 91,147.40
4. Step 4: Simplify right side
   144,947.72x = 18,224,275,483.46
5. Step 5: Solve for x
   x = 18,224,275,483.46/144,947.72
6. Step 6: Final answer
   x = 125,729.99