Finding the Fourth Proportional to 144,531.89, 199,405.57 and 84,089.59

Step by Step Solution

1. Step 1: Write the proportion equation
   144,531.89 : 199,405.57 = 84,089.59 : x
2. Step 2: Convert to fraction form
   144,531.89/199,405.57 = 84,089.59/x
3. Step 3: Cross multiply
   144,531.89x = 199,405.57 × 84,089.59
4. Step 4: Simplify right side
   144,531.89x = 16,767,933,432.10
5. Step 5: Solve for x
   x = 16,767,933,432.10/144,531.89
6. Step 6: Final answer
   x = 116,015.45