Finding the Fourth Proportional to 7,111,814.53, 10,663,401.79 and 2,788,685.21

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111,814.53 : 10,663,401.79 = 2,788,685.21 : x
2. Step 2: Convert to fraction form
   7,111,814.53/10,663,401.79 = 2,788,685.21/x
3. Step 3: Cross multiply
   7,111,814.53x = 10,663,401.79 × 2,788,685.21
4. Step 4: Simplify right side
   7,111,814.53x = 29,736,870,874,518.53
5. Step 5: Solve for x
   x = 29,736,870,874,518.53/7,111,814.53
6. Step 6: Final answer
   x = 4,181,333.86