Finding the Fourth Proportional to 12,905.80, 17,811.82 and 7,530.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,905.80 : 17,811.82 = 7,530.01 : x
2. Step 2: Convert to fraction form
   12,905.80/17,811.82 = 7,530.01/x
3. Step 3: Cross multiply
   12,905.80x = 17,811.82 × 7,530.01
4. Step 4: Simplify right side
   12,905.80x = 134,123,147.60
5. Step 5: Solve for x
   x = 134,123,147.60/12,905.80
6. Step 6: Final answer
   x = 10,392.47