Finding the Fourth Proportional to 13,109.67, 19,646.98 and 4,781.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109.67 : 19,646.98 = 4,781.86 : x
2. Step 2: Convert to fraction form
   13,109.67/19,646.98 = 4,781.86/x
3. Step 3: Cross multiply
   13,109.67x = 19,646.98 × 4,781.86
4. Step 4: Simplify right side
   13,109.67x = 93,949,107.78
5. Step 5: Solve for x
   x = 93,949,107.78/13,109.67
6. Step 6: Final answer
   x = 7,166.40