Finding the Fourth Proportional to 9,238,388.78, 12,748,556.77 and 5,317,978.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,238,388.78 : 12,748,556.77 = 5,317,978.05 : x
2. Step 2: Convert to fraction form
   9,238,388.78/12,748,556.77 = 5,317,978.05/x
3. Step 3: Cross multiply
   9,238,388.78x = 12,748,556.77 × 5,317,978.05
4. Step 4: Simplify right side
   9,238,388.78x = 67,796,545,008,296.11
5. Step 5: Solve for x
   x = 67,796,545,008,296.11/9,238,388.78
6. Step 6: Final answer
   x = 7,338,568.08