Finding the Fourth Proportional to 18,181,196.82, 25,090,583.99 and 9,921,791.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,181,196.82 : 25,090,583.99 = 9,921,791.31 : x
2. Step 2: Convert to fraction form
   18,181,196.82/25,090,583.99 = 9,921,791.31/x
3. Step 3: Cross multiply
   18,181,196.82x = 25,090,583.99 × 9,921,791.31
4. Step 4: Simplify right side
   18,181,196.82x = 248,943,538,194,807.12
5. Step 5: Solve for x
   x = 248,943,538,194,807.12/18,181,196.82
6. Step 6: Final answer
   x = 13,692,362.54