Finding the Fourth Proportional to 173,506.10, 260,016.15 and 138,028.10

Step by Step Solution

1. Step 1: Write the proportion equation
   173,506.10 : 260,016.15 = 138,028.10 : x
2. Step 2: Convert to fraction form
   173,506.10/260,016.15 = 138,028.10/x
3. Step 3: Cross multiply
   173,506.10x = 260,016.15 × 138,028.10
4. Step 4: Simplify right side
   173,506.10x = 35,889,535,153.82
5. Step 5: Solve for x
   x = 35,889,535,153.82/173,506.10
6. Step 6: Final answer
   x = 206,848.84