Finding the Fourth Proportional to 154,776.83, 213,588.69 and 86,792.31

Step by Step Solution

1. Step 1: Write the proportion equation
   154,776.83 : 213,588.69 = 86,792.31 : x
2. Step 2: Convert to fraction form
   154,776.83/213,588.69 = 86,792.31/x
3. Step 3: Cross multiply
   154,776.83x = 213,588.69 × 86,792.31
4. Step 4: Simplify right side
   154,776.83x = 18,537,855,044.02
5. Step 5: Solve for x
   x = 18,537,855,044.02/154,776.83
6. Step 6: Final answer
   x = 119,771.52