Finding the Fourth Proportional to 8,376.72, 12,572.76 and 8,345.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,376.72 : 12,572.76 = 8,345.34 : x
2. Step 2: Convert to fraction form
   8,376.72/12,572.76 = 8,345.34/x
3. Step 3: Cross multiply
   8,376.72x = 12,572.76 × 8,345.34
4. Step 4: Simplify right side
   8,376.72x = 104,923,956.94
5. Step 5: Solve for x
   x = 104,923,956.94/8,376.72
6. Step 6: Final answer
   x = 12,525.66