Finding the Fourth Proportional to 12,887,978.88, 17,784,932.76 and 7,086,415.44

Step by Step Solution

1. Step 1: Write the proportion equation
   12,887,978.88 : 17,784,932.76 = 7,086,415.44 : x
2. Step 2: Convert to fraction form
   12,887,978.88/17,784,932.76 = 7,086,415.44/x
3. Step 3: Cross multiply
   12,887,978.88x = 17,784,932.76 × 7,086,415.44
4. Step 4: Simplify right side
   12,887,978.88x = 126,031,422,109,825.83
5. Step 5: Solve for x
   x = 126,031,422,109,825.83/12,887,978.88
6. Step 6: Final answer
   x = 9,778,990.43