Finding the Fourth Proportional to 10,612.91, 15,925.34 and 9,776.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,612.91 : 15,925.34 = 9,776.38 : x
2. Step 2: Convert to fraction form
   10,612.91/15,925.34 = 9,776.38/x
3. Step 3: Cross multiply
   10,612.91x = 15,925.34 × 9,776.38
4. Step 4: Simplify right side
   10,612.91x = 155,692,086.77
5. Step 5: Solve for x
   x = 155,692,086.77/10,612.91
6. Step 6: Final answer
   x = 14,670.07