Finding the Fourth Proportional to 2,157,667.74, 3,237,145.50 and 641,401.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157,667.74 : 3,237,145.50 = 641,401.20 : x
2. Step 2: Convert to fraction form
   2,157,667.74/3,237,145.50 = 641,401.20/x
3. Step 3: Cross multiply
   2,157,667.74x = 3,237,145.50 × 641,401.20
4. Step 4: Simplify right side
   2,157,667.74x = 2,076,309,008,274.60
5. Step 5: Solve for x
   x = 2,076,309,008,274.60/2,157,667.74
6. Step 6: Final answer
   x = 962,293.21