Finding the Fourth Proportional to 12,705.56, 17,533.82 and 7,400.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.56 : 17,533.82 = 7,400.87 : x
2. Step 2: Convert to fraction form
   12,705.56/17,533.82 = 7,400.87/x
3. Step 3: Cross multiply
   12,705.56x = 17,533.82 × 7,400.87
4. Step 4: Simplify right side
   12,705.56x = 129,765,477.38
5. Step 5: Solve for x
   x = 129,765,477.38/12,705.56
6. Step 6: Final answer
   x = 10,213.28