Finding the Fourth Proportional to 146,856, 202,678.56 and 87,240

Step by Step Solution

1. Step 1: Write the proportion equation
   146,856 : 202,678.56 = 87,240 : x
2. Step 2: Convert to fraction form
   146,856/202,678.56 = 87,240/x
3. Step 3: Cross multiply
   146,856x = 202,678.56 × 87,240
4. Step 4: Simplify right side
   146,856x = 17,681,677,574.40
5. Step 5: Solve for x
   x = 17,681,677,574.40/146,856
6. Step 6: Final answer
   x = 120,401.47