Finding the Fourth Proportional to 78,890.58, 108,807.30 and 50,598.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,890.58 : 108,807.30 = 50,598.90 : x
2. Step 2: Convert to fraction form
   78,890.58/108,807.30 = 50,598.90/x
3. Step 3: Cross multiply
   78,890.58x = 108,807.30 × 50,598.90
4. Step 4: Simplify right side
   78,890.58x = 5,505,529,691.97
5. Step 5: Solve for x
   x = 5,505,529,691.97/78,890.58
6. Step 6: Final answer
   x = 69,786.91