Finding the Fourth Proportional to 393,308.72, 589,963.24 and 97,820.72

Step by Step Solution

1. Step 1: Write the proportion equation
   393,308.72 : 589,963.24 = 97,820.72 : x
2. Step 2: Convert to fraction form
   393,308.72/589,963.24 = 97,820.72/x
3. Step 3: Cross multiply
   393,308.72x = 589,963.24 × 97,820.72
4. Step 4: Simplify right side
   393,308.72x = 57,710,628,910.33
5. Step 5: Solve for x
   x = 57,710,628,910.33/393,308.72
6. Step 6: Final answer
   x = 146,731.12