Finding the Fourth Proportional to 283,997.76, 391,914.72 and 156,678.72

Step by Step Solution

1. Step 1: Write the proportion equation
   283,997.76 : 391,914.72 = 156,678.72 : x
2. Step 2: Convert to fraction form
   283,997.76/391,914.72 = 156,678.72/x
3. Step 3: Cross multiply
   283,997.76x = 391,914.72 × 156,678.72
4. Step 4: Simplify right side
   283,997.76x = 61,404,696,678.76
5. Step 5: Solve for x
   x = 61,404,696,678.76/283,997.76
6. Step 6: Final answer
   x = 216,215.43