Finding the Fourth Proportional to 272,223.02, 408,417.60 and 139,196.72

Step by Step Solution

1. Step 1: Write the proportion equation
   272,223.02 : 408,417.60 = 139,196.72 : x
2. Step 2: Convert to fraction form
   272,223.02/408,417.60 = 139,196.72/x
3. Step 3: Cross multiply
   272,223.02x = 408,417.60 × 139,196.72
4. Step 4: Simplify right side
   272,223.02x = 56,850,390,310.27
5. Step 5: Solve for x
   x = 56,850,390,310.27/272,223.02
6. Step 6: Final answer
   x = 208,837.56