Finding the Fourth Proportional to 104,128.82, 143,590.37 and 89,071.32

Step by Step Solution

1. Step 1: Write the proportion equation
   104,128.82 : 143,590.37 = 89,071.32 : x
2. Step 2: Convert to fraction form
   104,128.82/143,590.37 = 89,071.32/x
3. Step 3: Cross multiply
   104,128.82x = 143,590.37 × 89,071.32
4. Step 4: Simplify right side
   104,128.82x = 12,789,783,349.83
5. Step 5: Solve for x
   x = 12,789,783,349.83/104,128.82
6. Step 6: Final answer
   x = 122,826.55