Finding the Fourth Proportional to 1,128,034.10, 1,556,689.62 and 644,598.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,034.10 : 1,556,689.62 = 644,598.09 : x
2. Step 2: Convert to fraction form
   1,128,034.10/1,556,689.62 = 644,598.09/x
3. Step 3: Cross multiply
   1,128,034.10x = 1,556,689.62 × 644,598.09
4. Step 4: Simplify right side
   1,128,034.10x = 1,003,439,155,774.83
5. Step 5: Solve for x
   x = 1,003,439,155,774.83/1,128,034.10
6. Step 6: Final answer
   x = 889,546.83