Finding the Fourth Proportional to 22,577.31, 31,157.01 and 13,017

Step by Step Solution

1. Step 1: Write the proportion equation
   22,577.31 : 31,157.01 = 13,017 : x
2. Step 2: Convert to fraction form
   22,577.31/31,157.01 = 13,017/x
3. Step 3: Cross multiply
   22,577.31x = 31,157.01 × 13,017
4. Step 4: Simplify right side
   22,577.31x = 405,570,799.17
5. Step 5: Solve for x
   x = 405,570,799.17/22,577.31
6. Step 6: Final answer
   x = 17,963.65