Finding the Fourth Proportional to 19,809,802.05, 27,784,111.35 and 19,809,802.05

Step by Step Solution

1. Step 1: Write the proportion equation
   19,809,802.05 : 27,784,111.35 = 19,809,802.05 : x
2. Step 2: Convert to fraction form
   19,809,802.05/27,784,111.35 = 19,809,802.05/x
3. Step 3: Cross multiply
   19,809,802.05x = 27,784,111.35 × 19,809,802.05
4. Step 4: Simplify right side
   19,809,802.05x = 550,397,745,978,658.31
5. Step 5: Solve for x
   x = 550,397,745,978,658.31/19,809,802.05
6. Step 6: Final answer
   x = 27,784,111.35