Finding the Fourth Proportional to 13,066.55, 18,019.55 and 10,077.65

Step by Step Solution

1. Step 1: Write the proportion equation
   13,066.55 : 18,019.55 = 10,077.65 : x
2. Step 2: Convert to fraction form
   13,066.55/18,019.55 = 10,077.65/x
3. Step 3: Cross multiply
   13,066.55x = 18,019.55 × 10,077.65
4. Step 4: Simplify right side
   13,066.55x = 181,594,577.57
5. Step 5: Solve for x
   x = 181,594,577.57/13,066.55
6. Step 6: Final answer
   x = 13,897.67