Finding the Fourth Proportional to 9,430.06, 14,145.18 and 2,856.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,430.06 : 14,145.18 = 2,856.78 : x
2. Step 2: Convert to fraction form
   9,430.06/14,145.18 = 2,856.78/x
3. Step 3: Cross multiply
   9,430.06x = 14,145.18 × 2,856.78
4. Step 4: Simplify right side
   9,430.06x = 40,409,667.32
5. Step 5: Solve for x
   x = 40,409,667.32/9,430.06
6. Step 6: Final answer
   x = 4,285.20