Finding the Fourth Proportional to 20,407.37, 30,607.47 and 5,612.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,407.37 : 30,607.47 = 5,612.72 : x
2. Step 2: Convert to fraction form
   20,407.37/30,607.47 = 5,612.72/x
3. Step 3: Cross multiply
   20,407.37x = 30,607.47 × 5,612.72
4. Step 4: Simplify right side
   20,407.37x = 171,791,159.02
5. Step 5: Solve for x
   x = 171,791,159.02/20,407.37
6. Step 6: Final answer
   x = 8,418.09