Finding the Fourth Proportional to 39,061.72, 53,902.50 and 21,832.96

Step by Step Solution

1. Step 1: Write the proportion equation
   39,061.72 : 53,902.50 = 21,832.96 : x
2. Step 2: Convert to fraction form
   39,061.72/53,902.50 = 21,832.96/x
3. Step 3: Cross multiply
   39,061.72x = 53,902.50 × 21,832.96
4. Step 4: Simplify right side
   39,061.72x = 1,176,851,126.40
5. Step 5: Solve for x
   x = 1,176,851,126.40/39,061.72
6. Step 6: Final answer
   x = 30,127.99