Finding the Fourth Proportional to 9,005,989.86, 12,428,271.18 and 4,876,021.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,005,989.86 : 12,428,271.18 = 4,876,021.80 : x
2. Step 2: Convert to fraction form
   9,005,989.86/12,428,271.18 = 4,876,021.80/x
3. Step 3: Cross multiply
   9,005,989.86x = 12,428,271.18 × 4,876,021.80
4. Step 4: Simplify right side
   9,005,989.86x = 60,600,521,209,991.72
5. Step 5: Solve for x
   x = 60,600,521,209,991.72/9,005,989.86
6. Step 6: Final answer
   x = 6,728,912.88