Finding the Fourth Proportional to 42,267.42, 63,346.86 and 15,940.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,267.42 : 63,346.86 = 15,940.80 : x
2. Step 2: Convert to fraction form
   42,267.42/63,346.86 = 15,940.80/x
3. Step 3: Cross multiply
   42,267.42x = 63,346.86 × 15,940.80
4. Step 4: Simplify right side
   42,267.42x = 1,009,799,625.89
5. Step 5: Solve for x
   x = 1,009,799,625.89/42,267.42
6. Step 6: Final answer
   x = 23,890.73