Finding the Fourth Proportional to 61,172.69, 91,749.15 and 16,789.05

Step by Step Solution

1. Step 1: Write the proportion equation
   61,172.69 : 91,749.15 = 16,789.05 : x
2. Step 2: Convert to fraction form
   61,172.69/91,749.15 = 16,789.05/x
3. Step 3: Cross multiply
   61,172.69x = 91,749.15 × 16,789.05
4. Step 4: Simplify right side
   61,172.69x = 1,540,381,066.81
5. Step 5: Solve for x
   x = 1,540,381,066.81/61,172.69
6. Step 6: Final answer
   x = 25,180.86