Finding the Fourth Proportional to 81,900.80, 123,093.56 and 67,951.32

Step by Step Solution

1. Step 1: Write the proportion equation
   81,900.80 : 123,093.56 = 67,951.32 : x
2. Step 2: Convert to fraction form
   81,900.80/123,093.56 = 67,951.32/x
3. Step 3: Cross multiply
   81,900.80x = 123,093.56 × 67,951.32
4. Step 4: Simplify right side
   81,900.80x = 8,364,369,885.50
5. Step 5: Solve for x
   x = 8,364,369,885.50/81,900.80
6. Step 6: Final answer
   x = 102,128.06