Finding the Fourth Proportional to 13,470.05, 18,588.95 and 7,502.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,470.05 : 18,588.95 = 7,502.78 : x
2. Step 2: Convert to fraction form
   13,470.05/18,588.95 = 7,502.78/x
3. Step 3: Cross multiply
   13,470.05x = 18,588.95 × 7,502.78
4. Step 4: Simplify right side
   13,470.05x = 139,468,671.82
5. Step 5: Solve for x
   x = 139,468,671.82/13,470.05
6. Step 6: Final answer
   x = 10,353.99