Finding the Fourth Proportional to 13,971.72, 19,280.70 and 7,683.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,971.72 : 19,280.70 = 7,683.96 : x
2. Step 2: Convert to fraction form
   13,971.72/19,280.70 = 7,683.96/x
3. Step 3: Cross multiply
   13,971.72x = 19,280.70 × 7,683.96
4. Step 4: Simplify right side
   13,971.72x = 148,152,127.57
5. Step 5: Solve for x
   x = 148,152,127.57/13,971.72
6. Step 6: Final answer
   x = 10,603.71