Finding the Fourth Proportional to 25,458,663.78, 35,133,727.59 and 13,857,066.18

Step by Step Solution

1. Step 1: Write the proportion equation
   25,458,663.78 : 35,133,727.59 = 13,857,066.18 : x
2. Step 2: Convert to fraction form
   25,458,663.78/35,133,727.59 = 13,857,066.18/x
3. Step 3: Cross multiply
   25,458,663.78x = 35,133,727.59 × 13,857,066.18
4. Step 4: Simplify right side
   25,458,663.78x = 486,850,388,364,721.94
5. Step 5: Solve for x
   x = 486,850,388,364,721.94/25,458,663.78
6. Step 6: Final answer
   x = 19,123,171.29