Finding the Fourth Proportional to 283,003.12, 390,534.72 and 155,677.60

Step by Step Solution

1. Step 1: Write the proportion equation
   283,003.12 : 390,534.72 = 155,677.60 : x
2. Step 2: Convert to fraction form
   283,003.12/390,534.72 = 155,677.60/x
3. Step 3: Cross multiply
   283,003.12x = 390,534.72 × 155,677.60
4. Step 4: Simplify right side
   283,003.12x = 60,797,507,926.27
5. Step 5: Solve for x
   x = 60,797,507,926.27/283,003.12
6. Step 6: Final answer
   x = 214,829.82