Finding the Fourth Proportional to 9,510.21, 13,123.37 and 5,261.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,510.21 : 13,123.37 = 5,261.31 : x
2. Step 2: Convert to fraction form
   9,510.21/13,123.37 = 5,261.31/x
3. Step 3: Cross multiply
   9,510.21x = 13,123.37 × 5,261.31
4. Step 4: Simplify right side
   9,510.21x = 69,046,091.51
5. Step 5: Solve for x
   x = 69,046,091.51/9,510.21
6. Step 6: Final answer
   x = 7,260.21