Finding the Fourth Proportional to 342,221.47, 472,323.90 and 199,064.50

Step by Step Solution

1. Step 1: Write the proportion equation
   342,221.47 : 472,323.90 = 199,064.50 : x
2. Step 2: Convert to fraction form
   342,221.47/472,323.90 = 199,064.50/x
3. Step 3: Cross multiply
   342,221.47x = 472,323.90 × 199,064.50
4. Step 4: Simplify right side
   342,221.47x = 94,022,920,991.55
5. Step 5: Solve for x
   x = 94,022,920,991.55/342,221.47
6. Step 6: Final answer
   x = 274,742.91