Finding the Fourth Proportional to 1,989,723.83, 2,985,167.12 and 641,856.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989,723.83 : 2,985,167.12 = 641,856.69 : x
2. Step 2: Convert to fraction form
   1,989,723.83/2,985,167.12 = 641,856.69/x
3. Step 3: Cross multiply
   1,989,723.83x = 2,985,167.12 × 641,856.69
4. Step 4: Simplify right side
   1,989,723.83x = 1,916,049,483,530.75
5. Step 5: Solve for x
   x = 1,916,049,483,530.75/1,989,723.83
6. Step 6: Final answer
   x = 962,972.58