Finding the Fourth Proportional to 5,215,111.35, 7,196,842.10 and 2,891,946.45

Step by Step Solution

1. Step 1: Write the proportion equation
   5,215,111.35 : 7,196,842.10 = 2,891,946.45 : x
2. Step 2: Convert to fraction form
   5,215,111.35/7,196,842.10 = 2,891,946.45/x
3. Step 3: Cross multiply
   5,215,111.35x = 7,196,842.10 × 2,891,946.45
4. Step 4: Simplify right side
   5,215,111.35x = 20,812,881,980,297.65
5. Step 5: Solve for x
   x = 20,812,881,980,297.65/5,215,111.35
6. Step 6: Final answer
   x = 3,990,879.69