Finding the Fourth Proportional to 810,153.89, 1,118,012.35 and 470,644.01

Step by Step Solution

1. Step 1: Write the proportion equation
   810,153.89 : 1,118,012.35 = 470,644.01 : x
2. Step 2: Convert to fraction form
   810,153.89/1,118,012.35 = 470,644.01/x
3. Step 3: Cross multiply
   810,153.89x = 1,118,012.35 × 470,644.01
4. Step 4: Simplify right side
   810,153.89x = 526,185,815,633.52
5. Step 5: Solve for x
   x = 526,185,815,633.52/810,153.89
6. Step 6: Final answer
   x = 649,488.72