Finding the Fourth Proportional to 28,093.31, 42,168.16 and 13,110.69

Step by Step Solution

1. Step 1: Write the proportion equation
   28,093.31 : 42,168.16 = 13,110.69 : x
2. Step 2: Convert to fraction form
   28,093.31/42,168.16 = 13,110.69/x
3. Step 3: Cross multiply
   28,093.31x = 42,168.16 × 13,110.69
4. Step 4: Simplify right side
   28,093.31x = 552,853,673.63
5. Step 5: Solve for x
   x = 552,853,673.63/28,093.31
6. Step 6: Final answer
   x = 19,679.19