Finding the Fourth Proportional to 55,039.08, 82,571.16 and 19,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   55,039.08 : 82,571.16 = 19,978.72 : x
2. Step 2: Convert to fraction form
   55,039.08/82,571.16 = 19,978.72/x
3. Step 3: Cross multiply
   55,039.08x = 82,571.16 × 19,978.72
4. Step 4: Simplify right side
   55,039.08x = 1,649,666,085.72
5. Step 5: Solve for x
   x = 1,649,666,085.72/55,039.08
6. Step 6: Final answer
   x = 29,972.63