Finding the Fourth Proportional to 42,601.30, 63,893.85 and 13,020.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,601.30 : 63,893.85 = 13,020.10 : x
2. Step 2: Convert to fraction form
   42,601.30/63,893.85 = 13,020.10/x
3. Step 3: Cross multiply
   42,601.30x = 63,893.85 × 13,020.10
4. Step 4: Simplify right side
   42,601.30x = 831,904,316.39
5. Step 5: Solve for x
   x = 831,904,316.39/42,601.30
6. Step 6: Final answer
   x = 19,527.67