Finding the Fourth Proportional to 36,686.86, 55,038.69 and 13,313.30

Step by Step Solution

1. Step 1: Write the proportion equation
   36,686.86 : 55,038.69 = 13,313.30 : x
2. Step 2: Convert to fraction form
   36,686.86/55,038.69 = 13,313.30/x
3. Step 3: Cross multiply
   36,686.86x = 55,038.69 × 13,313.30
4. Step 4: Simplify right side
   36,686.86x = 732,746,316.38
5. Step 5: Solve for x
   x = 732,746,316.38/36,686.86
6. Step 6: Final answer
   x = 19,972.99