Finding the Fourth Proportional to 13,981.88, 20,985.78 and 7,061.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,981.88 : 20,985.78 = 7,061.24 : x
2. Step 2: Convert to fraction form
   13,981.88/20,985.78 = 7,061.24/x
3. Step 3: Cross multiply
   13,981.88x = 20,985.78 × 7,061.24
4. Step 4: Simplify right side
   13,981.88x = 148,185,629.17
5. Step 5: Solve for x
   x = 148,185,629.17/13,981.88
6. Step 6: Final answer
   x = 10,598.41