Finding the Fourth Proportional to 1,086,308.06, 1,499,006.06 and 644,706.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086,308.06 : 1,499,006.06 = 644,706.48 : x
2. Step 2: Convert to fraction form
   1,086,308.06/1,499,006.06 = 644,706.48/x
3. Step 3: Cross multiply
   1,086,308.06x = 1,499,006.06 × 644,706.48
4. Step 4: Simplify right side
   1,086,308.06x = 966,418,925,256.66
5. Step 5: Solve for x
   x = 966,418,925,256.66/1,086,308.06
6. Step 6: Final answer
   x = 889,636.16