Finding the Fourth Proportional to 12,306,913.28, 18,466,979.52 and 5,123,405.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,306,913.28 : 18,466,979.52 = 5,123,405.60 : x
2. Step 2: Convert to fraction form
   12,306,913.28/18,466,979.52 = 5,123,405.60/x
3. Step 3: Cross multiply
   12,306,913.28x = 18,466,979.52 × 5,123,405.60
4. Step 4: Simplify right side
   12,306,913.28x = 94,613,826,287,853.30
5. Step 5: Solve for x
   x = 94,613,826,287,853.30/12,306,913.28
6. Step 6: Final answer
   x = 7,687,860.00