Finding the Fourth Proportional to 42,615.50, 63,911 and 13,026.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,615.50 : 63,911 = 13,026.38 : x
2. Step 2: Convert to fraction form
   42,615.50/63,911 = 13,026.38/x
3. Step 3: Cross multiply
   42,615.50x = 63,911 × 13,026.38
4. Step 4: Simplify right side
   42,615.50x = 832,528,972.18
5. Step 5: Solve for x
   x = 832,528,972.18/42,615.50
6. Step 6: Final answer
   x = 19,535.83