Finding the Fourth Proportional to 3,996,129.72, 5,510,978.28 and 2,618,971.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,996,129.72 : 5,510,978.28 = 2,618,971.86 : x
2. Step 2: Convert to fraction form
   3,996,129.72/5,510,978.28 = 2,618,971.86/x
3. Step 3: Cross multiply
   3,996,129.72x = 5,510,978.28 × 2,618,971.86
4. Step 4: Simplify right side
   3,996,129.72x = 14,433,097,036,391.20
5. Step 5: Solve for x
   x = 14,433,097,036,391.20/3,996,129.72
6. Step 6: Final answer
   x = 3,611,768.90