Finding the Fourth Proportional to 1,160,885.82, 1,601,968.52 and 644,672.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160,885.82 : 1,601,968.52 = 644,672.45 : x
2. Step 2: Convert to fraction form
   1,160,885.82/1,601,968.52 = 644,672.45/x
3. Step 3: Cross multiply
   1,160,885.82x = 1,601,968.52 × 644,672.45
4. Step 4: Simplify right side
   1,160,885.82x = 1,032,744,976,227.88
5. Step 5: Solve for x
   x = 1,032,744,976,227.88/1,160,885.82
6. Step 6: Final answer
   x = 889,618.04