Finding the Fourth Proportional to 284,365.69, 392,426.57 and 155,300.90

Step by Step Solution

1. Step 1: Write the proportion equation
   284,365.69 : 392,426.57 = 155,300.90 : x
2. Step 2: Convert to fraction form
   284,365.69/392,426.57 = 155,300.90/x
3. Step 3: Cross multiply
   284,365.69x = 392,426.57 × 155,300.90
4. Step 4: Simplify right side
   284,365.69x = 60,944,197,931.03
5. Step 5: Solve for x
   x = 60,944,197,931.03/284,365.69
6. Step 6: Final answer
   x = 214,316.29