Finding the Fourth Proportional to 23,053, 31,815.30 and 13,117

Step by Step Solution

1. Step 1: Write the proportion equation
   23,053 : 31,815.30 = 13,117 : x
2. Step 2: Convert to fraction form
   23,053/31,815.30 = 13,117/x
3. Step 3: Cross multiply
   23,053x = 31,815.30 × 13,117
4. Step 4: Simplify right side
   23,053x = 417,321,290.10
5. Step 5: Solve for x
   x = 417,321,290.10/23,053
6. Step 6: Final answer
   x = 18,102.69