Finding the Fourth Proportional to 12,856.70, 17,748.02 and 7,551.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.70 : 17,748.02 = 7,551.86 : x
2. Step 2: Convert to fraction form
   12,856.70/17,748.02 = 7,551.86/x
3. Step 3: Cross multiply
   12,856.70x = 17,748.02 × 7,551.86
4. Step 4: Simplify right side
   12,856.70x = 134,030,492.46
5. Step 5: Solve for x
   x = 134,030,492.46/12,856.70
6. Step 6: Final answer
   x = 10,424.95