Finding the Fourth Proportional to 28,061.21, 38,724.69 and 15,314.49

Step by Step Solution

1. Step 1: Write the proportion equation
   28,061.21 : 38,724.69 = 15,314.49 : x
2. Step 2: Convert to fraction form
   28,061.21/38,724.69 = 15,314.49/x
3. Step 3: Cross multiply
   28,061.21x = 38,724.69 × 15,314.49
4. Step 4: Simplify right side
   28,061.21x = 593,048,877.76
5. Step 5: Solve for x
   x = 593,048,877.76/28,061.21
6. Step 6: Final answer
   x = 21,134.12