Finding the Fourth Proportional to 615,328.82, 923,090.82 and 260,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   615,328.82 : 923,090.82 = 260,345.50 : x
2. Step 2: Convert to fraction form
   615,328.82/923,090.82 = 260,345.50/x
3. Step 3: Cross multiply
   615,328.82x = 923,090.82 × 260,345.50
4. Step 4: Simplify right side
   615,328.82x = 240,322,541,078.31
5. Step 5: Solve for x
   x = 240,322,541,078.31/615,328.82
6. Step 6: Final answer
   x = 390,559.54