Finding the Fourth Proportional to 155,460.33, 231,978.01 and 138,705.18

Step by Step Solution

1. Step 1: Write the proportion equation
   155,460.33 : 231,978.01 = 138,705.18 : x
2. Step 2: Convert to fraction form
   155,460.33/231,978.01 = 138,705.18/x
3. Step 3: Cross multiply
   155,460.33x = 231,978.01 × 138,705.18
4. Step 4: Simplify right side
   155,460.33x = 32,176,551,633.09
5. Step 5: Solve for x
   x = 32,176,551,633.09/155,460.33
6. Step 6: Final answer
   x = 206,975.96