Finding the Fourth Proportional to 61,156.72, 91,718.43 and 16,772.91

Step by Step Solution

1. Step 1: Write the proportion equation
   61,156.72 : 91,718.43 = 16,772.91 : x
2. Step 2: Convert to fraction form
   61,156.72/91,718.43 = 16,772.91/x
3. Step 3: Cross multiply
   61,156.72x = 91,718.43 × 16,772.91
4. Step 4: Simplify right side
   61,156.72x = 1,538,384,971.73
5. Step 5: Solve for x
   x = 1,538,384,971.73/61,156.72
6. Step 6: Final answer
   x = 25,154.80