Finding the Fourth Proportional to 90,651, 135,543.78 and 82,710.48

Step by Step Solution

1. Step 1: Write the proportion equation
   90,651 : 135,543.78 = 82,710.48 : x
2. Step 2: Convert to fraction form
   90,651/135,543.78 = 82,710.48/x
3. Step 3: Cross multiply
   90,651x = 135,543.78 × 82,710.48
4. Step 4: Simplify right side
   90,651x = 11,210,891,104.81
5. Step 5: Solve for x
   x = 11,210,891,104.81/90,651
6. Step 6: Final answer
   x = 123,670.90