Finding the Fourth Proportional to 1,156,662.34, 1,596,243.89 and 640,416.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156,662.34 : 1,596,243.89 = 640,416.21 : x
2. Step 2: Convert to fraction form
   1,156,662.34/1,596,243.89 = 640,416.21/x
3. Step 3: Cross multiply
   1,156,662.34x = 1,596,243.89 × 640,416.21
4. Step 4: Simplify right side
   1,156,662.34x = 1,022,260,457,777.02
5. Step 5: Solve for x
   x = 1,022,260,457,777.02/1,156,662.34
6. Step 6: Final answer
   x = 883,801.97