Finding the Fourth Proportional to 14,389,898.86, 19,860,085.59 and 9,161,236.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,389,898.86 : 19,860,085.59 = 9,161,236.72 : x
2. Step 2: Convert to fraction form
   14,389,898.86/19,860,085.59 = 9,161,236.72/x
3. Step 3: Cross multiply
   14,389,898.86x = 19,860,085.59 × 9,161,236.72
4. Step 4: Simplify right side
   14,389,898.86x = 181,942,945,411,453.28
5. Step 5: Solve for x
   x = 181,942,945,411,453.28/14,389,898.86
6. Step 6: Final answer
   x = 12,643,795.99