Finding the Fourth Proportional to 21,055.37, 29,066.94 and 13,100.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,055.37 : 29,066.94 = 13,100.16 : x
2. Step 2: Convert to fraction form
   21,055.37/29,066.94 = 13,100.16/x
3. Step 3: Cross multiply
   21,055.37x = 29,066.94 × 13,100.16
4. Step 4: Simplify right side
   21,055.37x = 380,781,499.21
5. Step 5: Solve for x
   x = 380,781,499.21/21,055.37
6. Step 6: Final answer
   x = 18,084.77