Finding the Fourth Proportional to 409,992.83, 615,061.38 and 140,057.49

Step by Step Solution

1. Step 1: Write the proportion equation
   409,992.83 : 615,061.38 = 140,057.49 : x
2. Step 2: Convert to fraction form
   409,992.83/615,061.38 = 140,057.49/x
3. Step 3: Cross multiply
   409,992.83x = 615,061.38 × 140,057.49
4. Step 4: Simplify right side
   409,992.83x = 86,143,953,078.74
5. Step 5: Solve for x
   x = 86,143,953,078.74/409,992.83
6. Step 6: Final answer
   x = 210,110.88