Finding the Fourth Proportional to 42,025.89, 63,030.10 and 12,436.79

Step by Step Solution

1. Step 1: Write the proportion equation
   42,025.89 : 63,030.10 = 12,436.79 : x
2. Step 2: Convert to fraction form
   42,025.89/63,030.10 = 12,436.79/x
3. Step 3: Cross multiply
   42,025.89x = 63,030.10 × 12,436.79
4. Step 4: Simplify right side
   42,025.89x = 783,892,149.00
5. Step 5: Solve for x
   x = 783,892,149.00/42,025.89
6. Step 6: Final answer
   x = 18,652.60