Finding the Fourth Proportional to 13,401.59, 20,083.86 and 5,072.77

Step by Step Solution

1. Step 1: Write the proportion equation
   13,401.59 : 20,083.86 = 5,072.77 : x
2. Step 2: Convert to fraction form
   13,401.59/20,083.86 = 5,072.77/x
3. Step 3: Cross multiply
   13,401.59x = 20,083.86 × 5,072.77
4. Step 4: Simplify right side
   13,401.59x = 101,880,752.28
5. Step 5: Solve for x
   x = 101,880,752.28/13,401.59
6. Step 6: Final answer
   x = 7,602.14