Finding the Fourth Proportional to 427,969.32, 590,590.42 and 236,978.60

Step by Step Solution

1. Step 1: Write the proportion equation
   427,969.32 : 590,590.42 = 236,978.60 : x
2. Step 2: Convert to fraction form
   427,969.32/590,590.42 = 236,978.60/x
3. Step 3: Cross multiply
   427,969.32x = 590,590.42 × 236,978.60
4. Step 4: Simplify right side
   427,969.32x = 139,957,290,905.01
5. Step 5: Solve for x
   x = 139,957,290,905.01/427,969.32
6. Step 6: Final answer
   x = 327,026.46