Finding the Fourth Proportional to 52,185.12, 78,276.72 and 21,019.56

Step by Step Solution

1. Step 1: Write the proportion equation
   52,185.12 : 78,276.72 = 21,019.56 : x
2. Step 2: Convert to fraction form
   52,185.12/78,276.72 = 21,019.56/x
3. Step 3: Cross multiply
   52,185.12x = 78,276.72 × 21,019.56
4. Step 4: Simplify right side
   52,185.12x = 1,645,342,212.64
5. Step 5: Solve for x
   x = 1,645,342,212.64/52,185.12
6. Step 6: Final answer
   x = 31,528.95