Finding the Fourth Proportional to 1,030,868.30, 1,422,646.15 and 643,912.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030,868.30 : 1,422,646.15 = 643,912.82 : x
2. Step 2: Convert to fraction form
   1,030,868.30/1,422,646.15 = 643,912.82/x
3. Step 3: Cross multiply
   1,030,868.30x = 1,422,646.15 × 643,912.82
4. Step 4: Simplify right side
   1,030,868.30x = 916,060,094,308.64
5. Step 5: Solve for x
   x = 916,060,094,308.64/1,030,868.30
6. Step 6: Final answer
   x = 888,629.61