Finding the Fourth Proportional to 31,456,796.06, 43,401,606.18 and 20,288,563.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,456,796.06 : 43,401,606.18 = 20,288,563.40 : x
2. Step 2: Convert to fraction form
   31,456,796.06/43,401,606.18 = 20,288,563.40/x
3. Step 3: Cross multiply
   31,456,796.06x = 43,401,606.18 × 20,288,563.40
4. Step 4: Simplify right side
   31,456,796.06x = 880,556,238,644,761.75
5. Step 5: Solve for x
   x = 880,556,238,644,761.75/31,456,796.06
6. Step 6: Final answer
   x = 27,992,559.60