Finding the Fourth Proportional to 1,128,030.15, 1,556,684.18 and 644,594.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,030.15 : 1,556,684.18 = 644,594.13 : x
2. Step 2: Convert to fraction form
   1,128,030.15/1,556,684.18 = 644,594.13/x
3. Step 3: Cross multiply
   1,128,030.15x = 1,556,684.18 × 644,594.13
4. Step 4: Simplify right side
   1,128,030.15x = 1,003,429,481,468.89
5. Step 5: Solve for x
   x = 1,003,429,481,468.89/1,128,030.15
6. Step 6: Final answer
   x = 889,541.37