Finding the Fourth Proportional to 7,158,796.79, 9,879,141.18 and 3,939,532.79

Step by Step Solution

1. Step 1: Write the proportion equation
   7,158,796.79 : 9,879,141.18 = 3,939,532.79 : x
2. Step 2: Convert to fraction form
   7,158,796.79/9,879,141.18 = 3,939,532.79/x
3. Step 3: Cross multiply
   7,158,796.79x = 9,879,141.18 × 3,939,532.79
4. Step 4: Simplify right side
   7,158,796.79x = 38,919,200,615,649.29
5. Step 5: Solve for x
   x = 38,919,200,615,649.29/7,158,796.79
6. Step 6: Final answer
   x = 5,436,556.14