Finding the Fourth Proportional to 144,648.18, 199,590.62 and 90,895.10

Step by Step Solution

1. Step 1: Write the proportion equation
   144,648.18 : 199,590.62 = 90,895.10 : x
2. Step 2: Convert to fraction form
   144,648.18/199,590.62 = 90,895.10/x
3. Step 3: Cross multiply
   144,648.18x = 199,590.62 × 90,895.10
4. Step 4: Simplify right side
   144,648.18x = 18,141,807,911.53
5. Step 5: Solve for x
   x = 18,141,807,911.53/144,648.18
6. Step 6: Final answer
   x = 125,420.23