Finding the Fourth Proportional to 868,647.30, 1,300,638.15 and 868,647.30

Step by Step Solution

1. Step 1: Write the proportion equation
   868,647.30 : 1,300,638.15 = 868,647.30 : x
2. Step 2: Convert to fraction form
   868,647.30/1,300,638.15 = 868,647.30/x
3. Step 3: Cross multiply
   868,647.30x = 1,300,638.15 × 868,647.30
4. Step 4: Simplify right side
   868,647.30x = 1,129,795,817,274.49
5. Step 5: Solve for x
   x = 1,129,795,817,274.49/868,647.30
6. Step 6: Final answer
   x = 1,300,638.15