Finding the Fourth Proportional to 91,989.82, 126,996.21 and 55,697.47

Step by Step Solution

1. Step 1: Write the proportion equation
   91,989.82 : 126,996.21 = 55,697.47 : x
2. Step 2: Convert to fraction form
   91,989.82/126,996.21 = 55,697.47/x
3. Step 3: Cross multiply
   91,989.82x = 126,996.21 × 55,697.47
4. Step 4: Simplify right side
   91,989.82x = 7,073,367,596.59
5. Step 5: Solve for x
   x = 7,073,367,596.59/91,989.82
6. Step 6: Final answer
   x = 76,892.94