Finding the Fourth Proportional to 52,100.68, 78,150.76 and 18,820.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,100.68 : 78,150.76 = 18,820.72 : x
2. Step 2: Convert to fraction form
   52,100.68/78,150.76 = 18,820.72/x
3. Step 3: Cross multiply
   52,100.68x = 78,150.76 × 18,820.72
4. Step 4: Simplify right side
   52,100.68x = 1,470,853,571.75
5. Step 5: Solve for x
   x = 1,470,853,571.75/52,100.68
6. Step 6: Final answer
   x = 28,230.99