Finding the Fourth Proportional to 39,200.72, 54,096.92 and 21,296.06

Step by Step Solution

1. Step 1: Write the proportion equation
   39,200.72 : 54,096.92 = 21,296.06 : x
2. Step 2: Convert to fraction form
   39,200.72/54,096.92 = 21,296.06/x
3. Step 3: Cross multiply
   39,200.72x = 54,096.92 × 21,296.06
4. Step 4: Simplify right side
   39,200.72x = 1,152,051,254.14
5. Step 5: Solve for x
   x = 1,152,051,254.14/39,200.72
6. Step 6: Final answer
   x = 29,388.52