Finding the Fourth Proportional to 28,738.74, 43,093.50 and 13,143

Step by Step Solution

1. Step 1: Write the proportion equation
   28,738.74 : 43,093.50 = 13,143 : x
2. Step 2: Convert to fraction form
   28,738.74/43,093.50 = 13,143/x
3. Step 3: Cross multiply
   28,738.74x = 43,093.50 × 13,143
4. Step 4: Simplify right side
   28,738.74x = 566,377,870.50
5. Step 5: Solve for x
   x = 566,377,870.50/28,738.74
6. Step 6: Final answer
   x = 19,707.82