Finding the Fourth Proportional to 283,443.16, 391,151.54 and 156,118.76

Step by Step Solution

1. Step 1: Write the proportion equation
   283,443.16 : 391,151.54 = 156,118.76 : x
2. Step 2: Convert to fraction form
   283,443.16/391,151.54 = 156,118.76/x
3. Step 3: Cross multiply
   283,443.16x = 391,151.54 × 156,118.76
4. Step 4: Simplify right side
   283,443.16x = 61,066,093,396.89
5. Step 5: Solve for x
   x = 61,066,093,396.89/283,443.16
6. Step 6: Final answer
   x = 215,443.88