Finding the Fourth Proportional to 3,521,287.23, 5,309,086.98 and 3,499,428.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,521,287.23 : 5,309,086.98 = 3,499,428.18 : x
2. Step 2: Convert to fraction form
   3,521,287.23/5,309,086.98 = 3,499,428.18/x
3. Step 3: Cross multiply
   3,521,287.23x = 5,309,086.98 × 3,499,428.18
4. Step 4: Simplify right side
   3,521,287.23x = 18,578,768,587,883.10
5. Step 5: Solve for x
   x = 18,578,768,587,883.10/3,521,287.23
6. Step 6: Final answer
   x = 5,276,129.83