Finding the Fourth Proportional to 42,255.30, 63,374.85 and 12,674.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,255.30 : 63,374.85 = 12,674.10 : x
2. Step 2: Convert to fraction form
   42,255.30/63,374.85 = 12,674.10/x
3. Step 3: Cross multiply
   42,255.30x = 63,374.85 × 12,674.10
4. Step 4: Simplify right side
   42,255.30x = 803,219,186.39
5. Step 5: Solve for x
   x = 803,219,186.39/42,255.30
6. Step 6: Final answer
   x = 19,008.72