Finding the Fourth Proportional to 214,018.72, 321,071.28 and 147,490.72

Step by Step Solution

1. Step 1: Write the proportion equation
   214,018.72 : 321,071.28 = 147,490.72 : x
2. Step 2: Convert to fraction form
   214,018.72/321,071.28 = 147,490.72/x
3. Step 3: Cross multiply
   214,018.72x = 321,071.28 × 147,490.72
4. Step 4: Simplify right side
   214,018.72x = 47,355,034,258.52
5. Step 5: Solve for x
   x = 47,355,034,258.52/214,018.72
6. Step 6: Final answer
   x = 221,265.85