Finding the Fourth Proportional to 21,191,442.09, 31,791,901.55 and 7,728,270.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,191,442.09 : 31,791,901.55 = 7,728,270.09 : x
2. Step 2: Convert to fraction form
   21,191,442.09/31,791,901.55 = 7,728,270.09/x
3. Step 3: Cross multiply
   21,191,442.09x = 31,791,901.55 × 7,728,270.09
4. Step 4: Simplify right side
   21,191,442.09x = 245,696,401,814,448.31
5. Step 5: Solve for x
   x = 245,696,401,814,448.31/21,191,442.09
6. Step 6: Final answer
   x = 11,594,133.18