Finding the Fourth Proportional to 43,078.96, 64,618.47 and 13,499.10

Step by Step Solution

1. Step 1: Write the proportion equation
   43,078.96 : 64,618.47 = 13,499.10 : x
2. Step 2: Convert to fraction form
   43,078.96/64,618.47 = 13,499.10/x
3. Step 3: Cross multiply
   43,078.96x = 64,618.47 × 13,499.10
4. Step 4: Simplify right side
   43,078.96x = 872,291,188.38
5. Step 5: Solve for x
   x = 872,291,188.38/43,078.96
6. Step 6: Final answer
   x = 20,248.66