Finding the Fourth Proportional to 13,647.72, 20,471.59 and 3,787.01

Step by Step Solution

1. Step 1: Write the proportion equation
   13,647.72 : 20,471.59 = 3,787.01 : x
2. Step 2: Convert to fraction form
   13,647.72/20,471.59 = 3,787.01/x
3. Step 3: Cross multiply
   13,647.72x = 20,471.59 × 3,787.01
4. Step 4: Simplify right side
   13,647.72x = 77,526,095.19
5. Step 5: Solve for x
   x = 77,526,095.19/13,647.72
6. Step 6: Final answer
   x = 5,680.52