Finding the Fourth Proportional to 52,620.68, 78,960.18 and 21,453.52

Step by Step Solution

1. Step 1: Write the proportion equation
   52,620.68 : 78,960.18 = 21,453.52 : x
2. Step 2: Convert to fraction form
   52,620.68/78,960.18 = 21,453.52/x
3. Step 3: Cross multiply
   52,620.68x = 78,960.18 × 21,453.52
4. Step 4: Simplify right side
   52,620.68x = 1,693,973,800.83
5. Step 5: Solve for x
   x = 1,693,973,800.83/52,620.68
6. Step 6: Final answer
   x = 32,192.17