Finding the Fourth Proportional to 1,128,519.01, 1,557,356.34 and 645,094.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,519.01 : 1,557,356.34 = 645,094.72 : x
2. Step 2: Convert to fraction form
   1,128,519.01/1,557,356.34 = 645,094.72/x
3. Step 3: Cross multiply
   1,128,519.01x = 1,557,356.34 × 645,094.72
4. Step 4: Simplify right side
   1,128,519.01x = 1,004,642,352,092.52
5. Step 5: Solve for x
   x = 1,004,642,352,092.52/1,128,519.01
6. Step 6: Final answer
   x = 890,230.77