Finding the Fourth Proportional to 61,172.67, 91,749.15 and 16,789.05

Step by Step Solution

1. Step 1: Write the proportion equation
   61,172.67 : 91,749.15 = 16,789.05 : x
2. Step 2: Convert to fraction form
   61,172.67/91,749.15 = 16,789.05/x
3. Step 3: Cross multiply
   61,172.67x = 91,749.15 × 16,789.05
4. Step 4: Simplify right side
   61,172.67x = 1,540,381,066.81
5. Step 5: Solve for x
   x = 1,540,381,066.81/61,172.67
6. Step 6: Final answer
   x = 25,180.87