Finding the Fourth Proportional to 21,140,550.72, 29,173,485.60 and 12,319,456.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,140,550.72 : 29,173,485.60 = 12,319,456.32 : x
2. Step 2: Convert to fraction form
   21,140,550.72/29,173,485.60 = 12,319,456.32/x
3. Step 3: Cross multiply
   21,140,550.72x = 29,173,485.60 × 12,319,456.32
4. Step 4: Simplify right side
   21,140,550.72x = 359,401,481,551,349
5. Step 5: Solve for x
   x = 359,401,481,551,349/21,140,550.72
6. Step 6: Final answer
   x = 17,000,573.27