Finding the Fourth Proportional to 647,870.87, 894,080.81 and 361,384.81

Step by Step Solution

1. Step 1: Write the proportion equation
   647,870.87 : 894,080.81 = 361,384.81 : x
2. Step 2: Convert to fraction form
   647,870.87/894,080.81 = 361,384.81/x
3. Step 3: Cross multiply
   647,870.87x = 894,080.81 × 361,384.81
4. Step 4: Simplify right side
   647,870.87x = 323,107,222,314.76
5. Step 5: Solve for x
   x = 323,107,222,314.76/647,870.87
6. Step 6: Final answer
   x = 498,721.64