Finding the Fourth Proportional to 21,104,699.57, 29,101,357.58 and 13,748,891.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,104,699.57 : 29,101,357.58 = 13,748,891.83 : x
2. Step 2: Convert to fraction form
   21,104,699.57/29,101,357.58 = 13,748,891.83/x
3. Step 3: Cross multiply
   21,104,699.57x = 29,101,357.58 × 13,748,891.83
4. Step 4: Simplify right side
   21,104,699.57x = 400,111,417,473,570.56
5. Step 5: Solve for x
   x = 400,111,417,473,570.56/21,104,699.57
6. Step 6: Final answer
   x = 18,958,403.84