Finding the Fourth Proportional to 283,019.76, 390,576.96 and 155,700.72

Step by Step Solution

1. Step 1: Write the proportion equation
   283,019.76 : 390,576.96 = 155,700.72 : x
2. Step 2: Convert to fraction form
   283,019.76/390,576.96 = 155,700.72/x
3. Step 3: Cross multiply
   283,019.76x = 390,576.96 × 155,700.72
4. Step 4: Simplify right side
   283,019.76x = 60,813,113,887.41
5. Step 5: Solve for x
   x = 60,813,113,887.41/283,019.76
6. Step 6: Final answer
   x = 214,872.33