Finding the Fourth Proportional to 13,123, 18,109.74 and 7,534.36

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123 : 18,109.74 = 7,534.36 : x
2. Step 2: Convert to fraction form
   13,123/18,109.74 = 7,534.36/x
3. Step 3: Cross multiply
   13,123x = 18,109.74 × 7,534.36
4. Step 4: Simplify right side
   13,123x = 136,445,300.67
5. Step 5: Solve for x
   x = 136,445,300.67/13,123
6. Step 6: Final answer
   x = 10,397.42