Finding the Fourth Proportional to 42,087.23, 63,120.03 and 12,498.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,087.23 : 63,120.03 = 12,498.20 : x
2. Step 2: Convert to fraction form
   42,087.23/63,120.03 = 12,498.20/x
3. Step 3: Cross multiply
   42,087.23x = 63,120.03 × 12,498.20
4. Step 4: Simplify right side
   42,087.23x = 788,886,633.18
5. Step 5: Solve for x
   x = 788,886,633.18/42,087.23
6. Step 6: Final answer
   x = 18,744.09