Finding the Fourth Proportional to 42,013.17, 63,029.56 and 13,931.17

Step by Step Solution

1. Step 1: Write the proportion equation
   42,013.17 : 63,029.56 = 13,931.17 : x
2. Step 2: Convert to fraction form
   42,013.17/63,029.56 = 13,931.17/x
3. Step 3: Cross multiply
   42,013.17x = 63,029.56 × 13,931.17
4. Step 4: Simplify right side
   42,013.17x = 878,075,515.39
5. Step 5: Solve for x
   x = 878,075,515.39/42,013.17
6. Step 6: Final answer
   x = 20,900.01