Finding the Fourth Proportional to 144,573, 199,633.86 and 90,947.76

Step by Step Solution

1. Step 1: Write the proportion equation
   144,573 : 199,633.86 = 90,947.76 : x
2. Step 2: Convert to fraction form
   144,573/199,633.86 = 90,947.76/x
3. Step 3: Cross multiply
   144,573x = 199,633.86 × 90,947.76
4. Step 4: Simplify right side
   144,573x = 18,156,252,387.15
5. Step 5: Solve for x
   x = 18,156,252,387.15/144,573
6. Step 6: Final answer
   x = 125,585.36