Finding the Fourth Proportional to 42,101.69, 63,152.60 and 12,519.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,101.69 : 63,152.60 = 12,519.81 : x
2. Step 2: Convert to fraction form
   42,101.69/63,152.60 = 12,519.81/x
3. Step 3: Cross multiply
   42,101.69x = 63,152.60 × 12,519.81
4. Step 4: Simplify right side
   42,101.69x = 790,658,490.41
5. Step 5: Solve for x
   x = 790,658,490.41/42,101.69
6. Step 6: Final answer
   x = 18,779.74