Finding the Fourth Proportional to 283,100.72, 390,669.24 and 155,764.40

Step by Step Solution

1. Step 1: Write the proportion equation
   283,100.72 : 390,669.24 = 155,764.40 : x
2. Step 2: Convert to fraction form
   283,100.72/390,669.24 = 155,764.40/x
3. Step 3: Cross multiply
   283,100.72x = 390,669.24 × 155,764.40
4. Step 4: Simplify right side
   283,100.72x = 60,852,359,767.06
5. Step 5: Solve for x
   x = 60,852,359,767.06/283,100.72
6. Step 6: Final answer
   x = 214,949.51