Finding the Fourth Proportional to 36,699.30, 55,070.55 and 13,328.10

Step by Step Solution

1. Step 1: Write the proportion equation
   36,699.30 : 55,070.55 = 13,328.10 : x
2. Step 2: Convert to fraction form
   36,699.30/55,070.55 = 13,328.10/x
3. Step 3: Cross multiply
   36,699.30x = 55,070.55 × 13,328.10
4. Step 4: Simplify right side
   36,699.30x = 733,985,797.46
5. Step 5: Solve for x
   x = 733,985,797.46/36,699.30
6. Step 6: Final answer
   x = 19,999.99