Finding the Fourth Proportional to 1,148,185.54, 1,722,276.69 and 390,105.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148,185.54 : 1,722,276.69 = 390,105.73 : x
2. Step 2: Convert to fraction form
   1,148,185.54/1,722,276.69 = 390,105.73/x
3. Step 3: Cross multiply
   1,148,185.54x = 1,722,276.69 × 390,105.73
4. Step 4: Simplify right side
   1,148,185.54x = 671,870,005,414.43
5. Step 5: Solve for x
   x = 671,870,005,414.43/1,148,185.54
6. Step 6: Final answer
   x = 585,158.04