Finding the Fourth Proportional to 104,128.88, 143,590.46 and 89,071.39

Step by Step Solution

1. Step 1: Write the proportion equation
   104,128.88 : 143,590.46 = 89,071.39 : x
2. Step 2: Convert to fraction form
   104,128.88/143,590.46 = 89,071.39/x
3. Step 3: Cross multiply
   104,128.88x = 143,590.46 × 89,071.39
4. Step 4: Simplify right side
   104,128.88x = 12,789,801,862.94
5. Step 5: Solve for x
   x = 12,789,801,862.94/104,128.88
6. Step 6: Final answer
   x = 122,826.65