Finding the Fourth Proportional to 15,770.34, 21,762.81 and 8,697.42

Step by Step Solution

1. Step 1: Write the proportion equation
   15,770.34 : 21,762.81 = 8,697.42 : x
2. Step 2: Convert to fraction form
   15,770.34/21,762.81 = 8,697.42/x
3. Step 3: Cross multiply
   15,770.34x = 21,762.81 × 8,697.42
4. Step 4: Simplify right side
   15,770.34x = 189,280,298.95
5. Step 5: Solve for x
   x = 189,280,298.95/15,770.34
6. Step 6: Final answer
   x = 12,002.30