Finding the Fourth Proportional to 272,325.24, 408,870.59 and 139,300.97

Step by Step Solution

1. Step 1: Write the proportion equation
   272,325.24 : 408,870.59 = 139,300.97 : x
2. Step 2: Convert to fraction form
   272,325.24/408,870.59 = 139,300.97/x
3. Step 3: Cross multiply
   272,325.24x = 408,870.59 × 139,300.97
4. Step 4: Simplify right side
   272,325.24x = 56,956,067,050.61
5. Step 5: Solve for x
   x = 56,956,067,050.61/272,325.24
6. Step 6: Final answer
   x = 209,147.22