Finding the Fourth Proportional to 136,434.72, 204,642.09 and 42,967.20

Step by Step Solution

1. Step 1: Write the proportion equation
   136,434.72 : 204,642.09 = 42,967.20 : x
2. Step 2: Convert to fraction form
   136,434.72/204,642.09 = 42,967.20/x
3. Step 3: Cross multiply
   136,434.72x = 204,642.09 × 42,967.20
4. Step 4: Simplify right side
   136,434.72x = 8,792,897,609.45
5. Step 5: Solve for x
   x = 8,792,897,609.45/136,434.72
6. Step 6: Final answer
   x = 64,447.65