Finding the Fourth Proportional to 69,986.48, 104,892.23 and 55,136.75

Step by Step Solution

1. Step 1: Write the proportion equation
   69,986.48 : 104,892.23 = 55,136.75 : x
2. Step 2: Convert to fraction form
   69,986.48/104,892.23 = 55,136.75/x
3. Step 3: Cross multiply
   69,986.48x = 104,892.23 × 55,136.75
4. Step 4: Simplify right side
   69,986.48x = 5,783,416,275.83
5. Step 5: Solve for x
   x = 5,783,416,275.83/69,986.48
6. Step 6: Final answer
   x = 82,636.20