Finding the Fourth Proportional to 13,100.74, 18,079.48 and 7,435.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.74 : 18,079.48 = 7,435.50 : x
2. Step 2: Convert to fraction form
   13,100.74/18,079.48 = 7,435.50/x
3. Step 3: Cross multiply
   13,100.74x = 18,079.48 × 7,435.50
4. Step 4: Simplify right side
   13,100.74x = 134,429,973.54
5. Step 5: Solve for x
   x = 134,429,973.54/13,100.74
6. Step 6: Final answer
   x = 10,261.25