Finding the Fourth Proportional to 283,064.76, 390,635.42 and 155,740.72

Step by Step Solution

1. Step 1: Write the proportion equation
   283,064.76 : 390,635.42 = 155,740.72 : x
2. Step 2: Convert to fraction form
   283,064.76/390,635.42 = 155,740.72/x
3. Step 3: Cross multiply
   283,064.76x = 390,635.42 × 155,740.72
4. Step 4: Simplify right side
   283,064.76x = 60,837,841,568.30
5. Step 5: Solve for x
   x = 60,837,841,568.30/283,064.76
6. Step 6: Final answer
   x = 214,925.52