Finding the Fourth Proportional to 103,659.67, 155,796.24 and 86,004.86

Step by Step Solution

1. Step 1: Write the proportion equation
   103,659.67 : 155,796.24 = 86,004.86 : x
2. Step 2: Convert to fraction form
   103,659.67/155,796.24 = 86,004.86/x
3. Step 3: Cross multiply
   103,659.67x = 155,796.24 × 86,004.86
4. Step 4: Simplify right side
   103,659.67x = 13,399,233,809.73
5. Step 5: Solve for x
   x = 13,399,233,809.73/103,659.67
6. Step 6: Final answer
   x = 129,261.78