Finding the Fourth Proportional to 7,158,784, 9,879,123.54 and 3,939,520

Step by Step Solution

1. Step 1: Write the proportion equation
   7,158,784 : 9,879,123.54 = 3,939,520 : x
2. Step 2: Convert to fraction form
   7,158,784/9,879,123.54 = 3,939,520/x
3. Step 3: Cross multiply
   7,158,784x = 9,879,123.54 × 3,939,520
4. Step 4: Simplify right side
   7,158,784x = 38,919,004,768,300.80
5. Step 5: Solve for x
   x = 38,919,004,768,300.80/7,158,784
6. Step 6: Final answer
   x = 5,436,538.49