Finding the Fourth Proportional to 9,929.72, 13,792.85 and 9,770.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,929.72 : 13,792.85 = 9,770.96 : x
2. Step 2: Convert to fraction form
   9,929.72/13,792.85 = 9,770.96/x
3. Step 3: Cross multiply
   9,929.72x = 13,792.85 × 9,770.96
4. Step 4: Simplify right side
   9,929.72x = 134,769,385.64
5. Step 5: Solve for x
   x = 134,769,385.64/9,929.72
6. Step 6: Final answer
   x = 13,572.32