Finding the Fourth Proportional to 21,555,260.50, 29,741,819.00 and 12,386,131.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,555,260.50 : 29,741,819.00 = 12,386,131.78 : x
2. Step 2: Convert to fraction form
   21,555,260.50/29,741,819.00 = 12,386,131.78/x
3. Step 3: Cross multiply
   21,555,260.50x = 29,741,819.00 × 12,386,131.78
4. Step 4: Simplify right side
   21,555,260.50x = 368,386,089,300,268.06
5. Step 5: Solve for x
   x = 368,386,089,300,268.06/21,555,260.50
6. Step 6: Final answer
   x = 17,090,310.25