Finding the Fourth Proportional to 558,287.06, 770,434.00 and 303,642.50

Step by Step Solution

1. Step 1: Write the proportion equation
   558,287.06 : 770,434.00 = 303,642.50 : x
2. Step 2: Convert to fraction form
   558,287.06/770,434.00 = 303,642.50/x
3. Step 3: Cross multiply
   558,287.06x = 770,434.00 × 303,642.50
4. Step 4: Simplify right side
   558,287.06x = 233,936,501,233.72
5. Step 5: Solve for x
   x = 233,936,501,233.72/558,287.06
6. Step 6: Final answer
   x = 419,025.48