Finding the Fourth Proportional to 16,800.62, 25,151.72 and 13,091.63

Step by Step Solution

1. Step 1: Write the proportion equation
   16,800.62 : 25,151.72 = 13,091.63 : x
2. Step 2: Convert to fraction form
   16,800.62/25,151.72 = 13,091.63/x
3. Step 3: Cross multiply
   16,800.62x = 25,151.72 × 13,091.63
4. Step 4: Simplify right side
   16,800.62x = 329,276,820.89
5. Step 5: Solve for x
   x = 329,276,820.89/16,800.62
6. Step 6: Final answer
   x = 19,599.09