Finding the Fourth Proportional to 139,881.72, 209,824.02 and 111,979.14

Step by Step Solution

1. Step 1: Write the proportion equation
   139,881.72 : 209,824.02 = 111,979.14 : x
2. Step 2: Convert to fraction form
   139,881.72/209,824.02 = 111,979.14/x
3. Step 3: Cross multiply
   139,881.72x = 209,824.02 × 111,979.14
4. Step 4: Simplify right side
   139,881.72x = 23,495,913,310.94
5. Step 5: Solve for x
   x = 23,495,913,310.94/139,881.72
6. Step 6: Final answer
   x = 167,969.86