Finding the Fourth Proportional to 9,428.57, 14,142.89 and 3,188.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.57 : 14,142.89 = 3,188.63 : x
2. Step 2: Convert to fraction form
   9,428.57/14,142.89 = 3,188.63/x
3. Step 3: Cross multiply
   9,428.57x = 14,142.89 × 3,188.63
4. Step 4: Simplify right side
   9,428.57x = 45,096,443.34
5. Step 5: Solve for x
   x = 45,096,443.34/9,428.57
6. Step 6: Final answer
   x = 4,782.96