Finding the Fourth Proportional to 7,862,952.72, 10,854,222.72 and 5,286,128

Step by Step Solution

1. Step 1: Write the proportion equation
   7,862,952.72 : 10,854,222.72 = 5,286,128 : x
2. Step 2: Convert to fraction form
   7,862,952.72/10,854,222.72 = 5,286,128/x
3. Step 3: Cross multiply
   7,862,952.72x = 10,854,222.72 × 5,286,128
4. Step 4: Simplify right side
   7,862,952.72x = 57,376,810,638,428.16
5. Step 5: Solve for x
   x = 57,376,810,638,428.16/7,862,952.72
6. Step 6: Final answer
   x = 7,297,107.42