Finding the Fourth Proportional to 128,070.69, 192,103.32 and 42,687.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,070.69 : 192,103.32 = 42,687.72 : x
2. Step 2: Convert to fraction form
   128,070.69/192,103.32 = 42,687.72/x
3. Step 3: Cross multiply
   128,070.69x = 192,103.32 × 42,687.72
4. Step 4: Simplify right side
   128,070.69x = 8,200,452,735.23
5. Step 5: Solve for x
   x = 8,200,452,735.23/128,070.69
6. Step 6: Final answer
   x = 64,030.68