Finding the Fourth Proportional to 144,776.32, 199,888.98 and 90,411.56

Step by Step Solution

1. Step 1: Write the proportion equation
   144,776.32 : 199,888.98 = 90,411.56 : x
2. Step 2: Convert to fraction form
   144,776.32/199,888.98 = 90,411.56/x
3. Step 3: Cross multiply
   144,776.32x = 199,888.98 × 90,411.56
4. Step 4: Simplify right side
   144,776.32x = 18,072,274,508.61
5. Step 5: Solve for x
   x = 18,072,274,508.61/144,776.32
6. Step 6: Final answer
   x = 124,828.94