Finding the Fourth Proportional to 13,123.56, 18,109.80 and 7,534.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.56 : 18,109.80 = 7,534.56 : x
2. Step 2: Convert to fraction form
   13,123.56/18,109.80 = 7,534.56/x
3. Step 3: Cross multiply
   13,123.56x = 18,109.80 × 7,534.56
4. Step 4: Simplify right side
   13,123.56x = 136,449,374.69
5. Step 5: Solve for x
   x = 136,449,374.69/13,123.56
6. Step 6: Final answer
   x = 10,397.28