Finding the Fourth Proportional to 28,429.50, 42,659.61 and 13,837.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,429.50 : 42,659.61 = 13,837.50 : x
2. Step 2: Convert to fraction form
   28,429.50/42,659.61 = 13,837.50/x
3. Step 3: Cross multiply
   28,429.50x = 42,659.61 × 13,837.50
4. Step 4: Simplify right side
   28,429.50x = 590,302,353.38
5. Step 5: Solve for x
   x = 590,302,353.38/28,429.50
6. Step 6: Final answer
   x = 20,763.73