Finding the Fourth Proportional to 12,231,085.85, 18,306,706.71 and 8,991,765.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,231,085.85 : 18,306,706.71 = 8,991,765.71 : x
2. Step 2: Convert to fraction form
   12,231,085.85/18,306,706.71 = 8,991,765.71/x
3. Step 3: Cross multiply
   12,231,085.85x = 18,306,706.71 × 8,991,765.71
4. Step 4: Simplify right side
   12,231,085.85x = 164,609,617,658,004.94
5. Step 5: Solve for x
   x = 164,609,617,658,004.94/12,231,085.85
6. Step 6: Final answer
   x = 13,458,299.59