Finding the Fourth Proportional to 21,128,025.54, 31,694,178.83 and 7,293,181.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,128,025.54 : 31,694,178.83 = 7,293,181.09 : x
2. Step 2: Convert to fraction form
   21,128,025.54/31,694,178.83 = 7,293,181.09/x
3. Step 3: Cross multiply
   21,128,025.54x = 31,694,178.83 × 7,293,181.09
4. Step 4: Simplify right side
   21,128,025.54x = 231,151,385,706,034.31
5. Step 5: Solve for x
   x = 231,151,385,706,034.31/21,128,025.54
6. Step 6: Final answer
   x = 10,940,510.52