Finding the Fourth Proportional to 111,089.34, 166,591.49 and 39,991.59

Step by Step Solution

1. Step 1: Write the proportion equation
   111,089.34 : 166,591.49 = 39,991.59 : x
2. Step 2: Convert to fraction form
   111,089.34/166,591.49 = 39,991.59/x
3. Step 3: Cross multiply
   111,089.34x = 166,591.49 × 39,991.59
4. Step 4: Simplify right side
   111,089.34x = 6,662,258,365.61
5. Step 5: Solve for x
   x = 6,662,258,365.61/111,089.34
6. Step 6: Final answer
   x = 59,972.08