Finding the Fourth Proportional to 144,280.50, 199,128.96 and 87,680.94

Step by Step Solution

1. Step 1: Write the proportion equation
   144,280.50 : 199,128.96 = 87,680.94 : x
2. Step 2: Convert to fraction form
   144,280.50/199,128.96 = 87,680.94/x
3. Step 3: Cross multiply
   144,280.50x = 199,128.96 × 87,680.94
4. Step 4: Simplify right side
   144,280.50x = 17,459,814,394.02
5. Step 5: Solve for x
   x = 17,459,814,394.02/144,280.50
6. Step 6: Final answer
   x = 121,012.99