Finding the Fourth Proportional to 9,405,423.28, 12,980,684.78 and 5,538,304.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,405,423.28 : 12,980,684.78 = 5,538,304.28 : x
2. Step 2: Convert to fraction form
   9,405,423.28/12,980,684.78 = 5,538,304.28/x
3. Step 3: Cross multiply
   9,405,423.28x = 12,980,684.78 × 5,538,304.28
4. Step 4: Simplify right side
   9,405,423.28x = 71,890,982,074,404.86
5. Step 5: Solve for x
   x = 71,890,982,074,404.86/9,405,423.28
6. Step 6: Final answer
   x = 7,643,566.90