Finding the Fourth Proportional to 154,397.86, 213,020.50 and 86,404.03

Step by Step Solution

1. Step 1: Write the proportion equation
   154,397.86 : 213,020.50 = 86,404.03 : x
2. Step 2: Convert to fraction form
   154,397.86/213,020.50 = 86,404.03/x
3. Step 3: Cross multiply
   154,397.86x = 213,020.50 × 86,404.03
4. Step 4: Simplify right side
   154,397.86x = 18,405,829,240.59
5. Step 5: Solve for x
   x = 18,405,829,240.59/154,397.86
6. Step 6: Final answer
   x = 119,210.39