Finding the Fourth Proportional to 43,400.86, 65,104.53 and 18,438.10

Step by Step Solution

1. Step 1: Write the proportion equation
   43,400.86 : 65,104.53 = 18,438.10 : x
2. Step 2: Convert to fraction form
   43,400.86/65,104.53 = 18,438.10/x
3. Step 3: Cross multiply
   43,400.86x = 65,104.53 × 18,438.10
4. Step 4: Simplify right side
   43,400.86x = 1,200,403,834.59
5. Step 5: Solve for x
   x = 1,200,403,834.59/43,400.86
6. Step 6: Final answer
   x = 27,658.53