Finding the Fourth Proportional to 213,549.72, 320,354.01 and 73,290.12

Step by Step Solution

1. Step 1: Write the proportion equation
   213,549.72 : 320,354.01 = 73,290.12 : x
2. Step 2: Convert to fraction form
   213,549.72/320,354.01 = 73,290.12/x
3. Step 3: Cross multiply
   213,549.72x = 320,354.01 × 73,290.12
4. Step 4: Simplify right side
   213,549.72x = 23,478,783,835.38
5. Step 5: Solve for x
   x = 23,478,783,835.38/213,549.72
6. Step 6: Final answer
   x = 109,945.28