Finding the Fourth Proportional to 9,360,128.40, 12,916,745.37 and 5,229,906

Step by Step Solution

1. Step 1: Write the proportion equation
   9,360,128.40 : 12,916,745.37 = 5,229,906 : x
2. Step 2: Convert to fraction form
   9,360,128.40/12,916,745.37 = 5,229,906/x
3. Step 3: Cross multiply
   9,360,128.40x = 12,916,745.37 × 5,229,906
4. Step 4: Simplify right side
   9,360,128.40x = 67,553,364,111,035.22
5. Step 5: Solve for x
   x = 67,553,364,111,035.22/9,360,128.40
6. Step 6: Final answer
   x = 7,217,140.75