Finding the Fourth Proportional to 355,116.96, 489,475.98 and 251,784.72

Step by Step Solution

1. Step 1: Write the proportion equation
   355,116.96 : 489,475.98 = 251,784.72 : x
2. Step 2: Convert to fraction form
   355,116.96/489,475.98 = 251,784.72/x
3. Step 3: Cross multiply
   355,116.96x = 489,475.98 × 251,784.72
4. Step 4: Simplify right side
   355,116.96x = 123,242,572,571.03
5. Step 5: Solve for x
   x = 123,242,572,571.03/355,116.96
6. Step 6: Final answer
   x = 347,047.84