Finding the Third Proportional to 2,857,156.88 and 3,890,887.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,857,156.88 : 3,890,887.31 = 3,890,887.31 : x
2. Step 2: Convert to fraction form
   2,857,156.88/3,890,887.31 = 3,890,887.31/x
3. Step 3: Cross multiply
   2,857,156.88x = 3,890,887.31 × 3,890,887.31
4. Step 4: Simplify right side
   2,857,156.88x = 15,139,004,078,573.47
5. Step 5: Solve for x
   x = 15,139,004,078,573.47/2,857,156.88
6. Step 6: Final answer
   x = 5,298,625.43