Finding the Fourth Proportional to 28,364.56, 39,151.72 and 16,430.84

Step by Step Solution

1. Step 1: Write the proportion equation
   28,364.56 : 39,151.72 = 16,430.84 : x
2. Step 2: Convert to fraction form
   28,364.56/39,151.72 = 16,430.84/x
3. Step 3: Cross multiply
   28,364.56x = 39,151.72 × 16,430.84
4. Step 4: Simplify right side
   28,364.56x = 643,295,647.04
5. Step 5: Solve for x
   x = 643,295,647.04/28,364.56
6. Step 6: Final answer
   x = 22,679.56