Finding the Fourth Proportional to 21,056,015.54, 29,057,501.76 and 12,354,336.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,056,015.54 : 29,057,501.76 = 12,354,336.20 : x
2. Step 2: Convert to fraction form
   21,056,015.54/29,057,501.76 = 12,354,336.20/x
3. Step 3: Cross multiply
   21,056,015.54x = 29,057,501.76 × 12,354,336.20
4. Step 4: Simplify right side
   21,056,015.54x = 358,986,145,875,131.69
5. Step 5: Solve for x
   x = 358,986,145,875,131.69/21,056,015.54
6. Step 6: Final answer
   x = 17,049,101.49