Finding the Fourth Proportional to 1,045.69, 1,442.43 and 647.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.69 : 1,442.43 = 647.50 : x
2. Step 2: Convert to fraction form
   1,045.69/1,442.43 = 647.50/x
3. Step 3: Cross multiply
   1,045.69x = 1,442.43 × 647.50
4. Step 4: Simplify right side
   1,045.69x = 933,973.43
5. Step 5: Solve for x
   x = 933,973.43/1,045.69
6. Step 6: Final answer
   x = 893.16