Finding the Fourth Proportional to 1,011,168.72, 1,395,404.28 and 558,450

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011,168.72 : 1,395,404.28 = 558,450 : x
2. Step 2: Convert to fraction form
   1,011,168.72/1,395,404.28 = 558,450/x
3. Step 3: Cross multiply
   1,011,168.72x = 1,395,404.28 × 558,450
4. Step 4: Simplify right side
   1,011,168.72x = 779,263,520,166
5. Step 5: Solve for x
   x = 779,263,520,166/1,011,168.72
6. Step 6: Final answer
   x = 770,656.28