Finding the Fourth Proportional to 155,462.31, 231,981.01 and 138,707.19

Step by Step Solution

1. Step 1: Write the proportion equation
   155,462.31 : 231,981.01 = 138,707.19 : x
2. Step 2: Convert to fraction form
   155,462.31/231,981.01 = 138,707.19/x
3. Step 3: Cross multiply
   155,462.31x = 231,981.01 × 138,707.19
4. Step 4: Simplify right side
   155,462.31x = 32,177,433,683.69
5. Step 5: Solve for x
   x = 32,177,433,683.69/155,462.31
6. Step 6: Final answer
   x = 206,979.00