Finding the Fourth Proportional to 144,633.78, 199,570.84 and 90,880.72

Step by Step Solution

1. Step 1: Write the proportion equation
   144,633.78 : 199,570.84 = 90,880.72 : x
2. Step 2: Convert to fraction form
   144,633.78/199,570.84 = 90,880.72/x
3. Step 3: Cross multiply
   144,633.78x = 199,570.84 × 90,880.72
4. Step 4: Simplify right side
   144,633.78x = 18,137,141,630.20
5. Step 5: Solve for x
   x = 18,137,141,630.20/144,633.78
6. Step 6: Final answer
   x = 125,400.45