Finding the Fourth Proportional to 39,019.86, 53,847.17 and 21,114.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,019.86 : 53,847.17 = 21,114.72 : x
2. Step 2: Convert to fraction form
   39,019.86/53,847.17 = 21,114.72/x
3. Step 3: Cross multiply
   39,019.86x = 53,847.17 × 21,114.72
4. Step 4: Simplify right side
   39,019.86x = 1,136,967,917.34
5. Step 5: Solve for x
   x = 1,136,967,917.34/39,019.86
6. Step 6: Final answer
   x = 29,138.19