Finding the Fourth Proportional to 42,305.52, 63,410.76 and 20,100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,305.52 : 63,410.76 = 20,100.72 : x
2. Step 2: Convert to fraction form
   42,305.52/63,410.76 = 20,100.72/x
3. Step 3: Cross multiply
   42,305.52x = 63,410.76 × 20,100.72
4. Step 4: Simplify right side
   42,305.52x = 1,274,601,931.75
5. Step 5: Solve for x
   x = 1,274,601,931.75/42,305.52
6. Step 6: Final answer
   x = 30,128.50