Finding the Fourth Proportional to 1,015,723.80, 1,401,689.88 and 556,830.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015,723.80 : 1,401,689.88 = 556,830.03 : x
2. Step 2: Convert to fraction form
   1,015,723.80/1,401,689.88 = 556,830.03/x
3. Step 3: Cross multiply
   1,015,723.80x = 1,401,689.88 × 556,830.03
4. Step 4: Simplify right side
   1,015,723.80x = 780,503,017,931.10
5. Step 5: Solve for x
   x = 780,503,017,931.10/1,015,723.80
6. Step 6: Final answer
   x = 768,420.53