Finding the Fourth Proportional to 28,097.82, 42,167.48 and 13,306.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,097.82 : 42,167.48 = 13,306.72 : x
2. Step 2: Convert to fraction form
   28,097.82/42,167.48 = 13,306.72/x
3. Step 3: Cross multiply
   28,097.82x = 42,167.48 × 13,306.72
4. Step 4: Simplify right side
   28,097.82x = 561,110,677.51
5. Step 5: Solve for x
   x = 561,110,677.51/28,097.82
6. Step 6: Final answer
   x = 19,969.90