Finding the Fourth Proportional to 1,410.61, 2,116.52 and 761.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.61 : 2,116.52 = 761.21 : x
2. Step 2: Convert to fraction form
   1,410.61/2,116.52 = 761.21/x
3. Step 3: Cross multiply
   1,410.61x = 2,116.52 × 761.21
4. Step 4: Simplify right side
   1,410.61x = 1,611,112.38
5. Step 5: Solve for x
   x = 1,611,112.38/1,410.61
6. Step 6: Final answer
   x = 1,142.14