Finding the Fourth Proportional to 390,784.43, 585,870.41 and 154,304.12

Step by Step Solution

1. Step 1: Write the proportion equation
   390,784.43 : 585,870.41 = 154,304.12 : x
2. Step 2: Convert to fraction form
   390,784.43/585,870.41 = 154,304.12/x
3. Step 3: Cross multiply
   390,784.43x = 585,870.41 × 154,304.12
4. Step 4: Simplify right side
   390,784.43x = 90,402,215,505.50
5. Step 5: Solve for x
   x = 90,402,215,505.50/390,784.43
6. Step 6: Final answer
   x = 231,335.26