Finding the Fourth Proportional to 140,640, 210,994.56 and 42,144

Step by Step Solution

1. Step 1: Write the proportion equation
   140,640 : 210,994.56 = 42,144 : x
2. Step 2: Convert to fraction form
   140,640/210,994.56 = 42,144/x
3. Step 3: Cross multiply
   140,640x = 210,994.56 × 42,144
4. Step 4: Simplify right side
   140,640x = 8,892,154,736.64
5. Step 5: Solve for x
   x = 8,892,154,736.64/140,640
6. Step 6: Final answer
   x = 63,226.36