Finding the Fourth Proportional to 9,258,776.16, 12,777,213.28 and 5,128,870.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,258,776.16 : 12,777,213.28 = 5,128,870.56 : x
2. Step 2: Convert to fraction form
   9,258,776.16/12,777,213.28 = 5,128,870.56/x
3. Step 3: Cross multiply
   9,258,776.16x = 12,777,213.28 × 5,128,870.56
4. Step 4: Simplify right side
   9,258,776.16x = 65,532,673,030,633.03
5. Step 5: Solve for x
   x = 65,532,673,030,633.03/9,258,776.16
6. Step 6: Final answer
   x = 7,077,897.97