Finding the Fourth Proportional to 1,588.72, 2,192.52 and 999.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.72 : 2,192.52 = 999.04 : x
2. Step 2: Convert to fraction form
   1,588.72/2,192.52 = 999.04/x
3. Step 3: Cross multiply
   1,588.72x = 2,192.52 × 999.04
4. Step 4: Simplify right side
   1,588.72x = 2,190,415.18
5. Step 5: Solve for x
   x = 2,190,415.18/1,588.72
6. Step 6: Final answer
   x = 1,378.73