Finding the Fourth Proportional to 765,665.15, 1,149,208.20 and 386,852.00

Step by Step Solution

1. Step 1: Write the proportion equation
   765,665.15 : 1,149,208.20 = 386,852.00 : x
2. Step 2: Convert to fraction form
   765,665.15/1,149,208.20 = 386,852.00/x
3. Step 3: Cross multiply
   765,665.15x = 1,149,208.20 × 386,852.00
4. Step 4: Simplify right side
   765,665.15x = 444,573,484,840.36
5. Step 5: Solve for x
   x = 444,573,484,840.36/765,665.15
6. Step 6: Final answer
   x = 580,636.96