Finding the Fourth Proportional to 23,100.34, 31,878.64 and 13,028.98

Step by Step Solution

1. Step 1: Write the proportion equation
   23,100.34 : 31,878.64 = 13,028.98 : x
2. Step 2: Convert to fraction form
   23,100.34/31,878.64 = 13,028.98/x
3. Step 3: Cross multiply
   23,100.34x = 31,878.64 × 13,028.98
4. Step 4: Simplify right side
   23,100.34x = 415,346,033.05
5. Step 5: Solve for x
   x = 415,346,033.05/23,100.34
6. Step 6: Final answer
   x = 17,980.08