Finding the Fourth Proportional to 90,863.06, 136,286.79 and 55,315.16

Step by Step Solution

1. Step 1: Write the proportion equation
   90,863.06 : 136,286.79 = 55,315.16 : x
2. Step 2: Convert to fraction form
   90,863.06/136,286.79 = 55,315.16/x
3. Step 3: Cross multiply
   90,863.06x = 136,286.79 × 55,315.16
4. Step 4: Simplify right side
   90,863.06x = 7,538,724,913.30
5. Step 5: Solve for x
   x = 7,538,724,913.30/90,863.06
6. Step 6: Final answer
   x = 82,967.99