Finding the Fourth Proportional to 104,128.32, 143,589.67 and 89,070.82

Step by Step Solution

1. Step 1: Write the proportion equation
   104,128.32 : 143,589.67 = 89,070.82 : x
2. Step 2: Convert to fraction form
   104,128.32/143,589.67 = 89,070.82/x
3. Step 3: Cross multiply
   104,128.32x = 143,589.67 × 89,070.82
4. Step 4: Simplify right side
   104,128.32x = 12,789,649,650.43
5. Step 5: Solve for x
   x = 12,789,649,650.43/104,128.32
6. Step 6: Final answer
   x = 122,825.85