Finding the Fourth Proportional to 9,258,770.59, 12,777,205.61 and 5,128,865

Step by Step Solution

1. Step 1: Write the proportion equation
   9,258,770.59 : 12,777,205.61 = 5,128,865 : x
2. Step 2: Convert to fraction form
   9,258,770.59/12,777,205.61 = 5,128,865/x
3. Step 3: Cross multiply
   9,258,770.59x = 12,777,205.61 × 5,128,865
4. Step 4: Simplify right side
   9,258,770.59x = 65,532,562,650,932.65
5. Step 5: Solve for x
   x = 65,532,562,650,932.65/9,258,770.59
6. Step 6: Final answer
   x = 7,077,890.31