Finding the Fourth Proportional to 105,282.32, 145,443.26 and 91,110.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,282.32 : 145,443.26 = 91,110.56 : x
2. Step 2: Convert to fraction form
   105,282.32/145,443.26 = 91,110.56/x
3. Step 3: Cross multiply
   105,282.32x = 145,443.26 × 91,110.56
4. Step 4: Simplify right side
   105,282.32x = 13,251,416,866.83
5. Step 5: Solve for x
   x = 13,251,416,866.83/105,282.32
6. Step 6: Final answer
   x = 125,865.55