Finding the Fourth Proportional to 1,026.61, 1,416.78 and 607.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,026.61 : 1,416.78 = 607.21 : x
2. Step 2: Convert to fraction form
   1,026.61/1,416.78 = 607.21/x
3. Step 3: Cross multiply
   1,026.61x = 1,416.78 × 607.21
4. Step 4: Simplify right side
   1,026.61x = 860,272.86
5. Step 5: Solve for x
   x = 860,272.86/1,026.61
6. Step 6: Final answer
   x = 837.98