Finding the Fourth Proportional to 112,809.09, 155,659.72 and 69,831.81

Step by Step Solution

1. Step 1: Write the proportion equation
   112,809.09 : 155,659.72 = 69,831.81 : x
2. Step 2: Convert to fraction form
   112,809.09/155,659.72 = 69,831.81/x
3. Step 3: Cross multiply
   112,809.09x = 155,659.72 × 69,831.81
4. Step 4: Simplify right side
   112,809.09x = 10,869,999,991.69
5. Step 5: Solve for x
   x = 10,869,999,991.69/112,809.09
6. Step 6: Final answer
   x = 96,357.48