Finding the Fourth Proportional to 9,428.18, 13,010.31 and 5,448.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.18 : 13,010.31 = 5,448.45 : x
2. Step 2: Convert to fraction form
   9,428.18/13,010.31 = 5,448.45/x
3. Step 3: Cross multiply
   9,428.18x = 13,010.31 × 5,448.45
4. Step 4: Simplify right side
   9,428.18x = 70,886,023.52
5. Step 5: Solve for x
   x = 70,886,023.52/9,428.18
6. Step 6: Final answer
   x = 7,518.53