Finding the Fourth Proportional to 251,978.10, 353,235.90 and 251,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   251,978.10 : 353,235.90 = 251,978.10 : x
2. Step 2: Convert to fraction form
   251,978.10/353,235.90 = 251,978.10/x
3. Step 3: Cross multiply
   251,978.10x = 353,235.90 × 251,978.10
4. Step 4: Simplify right side
   251,978.10x = 89,007,710,933.79
5. Step 5: Solve for x
   x = 89,007,710,933.79/251,978.10
6. Step 6: Final answer
   x = 353,235.90