Finding the Fourth Proportional to 8,898,329.91, 12,279,792 and 5,227,401.21

Step by Step Solution

1. Step 1: Write the proportion equation
   8,898,329.91 : 12,279,792 = 5,227,401.21 : x
2. Step 2: Convert to fraction form
   8,898,329.91/12,279,792 = 5,227,401.21/x
3. Step 3: Cross multiply
   8,898,329.91x = 12,279,792 × 5,227,401.21
4. Step 4: Simplify right side
   8,898,329.91x = 64,191,399,559,348.32
5. Step 5: Solve for x
   x = 64,191,399,559,348.32/8,898,329.91
6. Step 6: Final answer
   x = 7,213,870.49