Finding the Fourth Proportional to 1,156,651.47, 1,596,228.90 and 640,405.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156,651.47 : 1,596,228.90 = 640,405.34 : x
2. Step 2: Convert to fraction form
   1,156,651.47/1,596,228.90 = 640,405.34/x
3. Step 3: Cross multiply
   1,156,651.47x = 1,596,228.90 × 640,405.34
4. Step 4: Simplify right side
   1,156,651.47x = 1,022,233,516,004.31
5. Step 5: Solve for x
   x = 1,022,233,516,004.31/1,156,651.47
6. Step 6: Final answer
   x = 883,786.99