Finding the Fourth Proportional to 154,667.34, 213,455.91 and 86,695.86

Step by Step Solution

1. Step 1: Write the proportion equation
   154,667.34 : 213,455.91 = 86,695.86 : x
2. Step 2: Convert to fraction form
   154,667.34/213,455.91 = 86,695.86/x
3. Step 3: Cross multiply
   154,667.34x = 213,455.91 × 86,695.86
4. Step 4: Simplify right side
   154,667.34x = 18,505,743,689.53
5. Step 5: Solve for x
   x = 18,505,743,689.53/154,667.34
6. Step 6: Final answer
   x = 119,648.68