Finding the Fourth Proportional to 42,686.29, 63,977.59 and 30,209.96

Step by Step Solution

1. Step 1: Write the proportion equation
   42,686.29 : 63,977.59 = 30,209.96 : x
2. Step 2: Convert to fraction form
   42,686.29/63,977.59 = 30,209.96/x
3. Step 3: Cross multiply
   42,686.29x = 63,977.59 × 30,209.96
4. Step 4: Simplify right side
   42,686.29x = 1,932,759,963.86
5. Step 5: Solve for x
   x = 1,932,759,963.86/42,686.29
6. Step 6: Final answer
   x = 45,278.24