Finding the Fourth Proportional to 28,518.50, 42,777.59 and 7,742.00

Step by Step Solution

1. Step 1: Write the proportion equation
   28,518.50 : 42,777.59 = 7,742.00 : x
2. Step 2: Convert to fraction form
   28,518.50/42,777.59 = 7,742.00/x
3. Step 3: Cross multiply
   28,518.50x = 42,777.59 × 7,742.00
4. Step 4: Simplify right side
   28,518.50x = 331,183,849.18
5. Step 5: Solve for x
   x = 331,183,849.18/28,518.50
6. Step 6: Final answer
   x = 11,612.95