Finding the Fourth Proportional to 139,886.72, 209,831.54 and 111,984.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,886.72 : 209,831.54 = 111,984.16 : x
2. Step 2: Convert to fraction form
   139,886.72/209,831.54 = 111,984.16/x
3. Step 3: Cross multiply
   139,886.72x = 209,831.54 × 111,984.16
4. Step 4: Simplify right side
   139,886.72x = 23,497,808,748.41
5. Step 5: Solve for x
   x = 23,497,808,748.41/139,886.72
6. Step 6: Final answer
   x = 167,977.41