Finding the Fourth Proportional to 1,588.93, 2,191.52 and 1,392.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.93 : 2,191.52 = 1,392.10 : x
2. Step 2: Convert to fraction form
   1,588.93/2,191.52 = 1,392.10/x
3. Step 3: Cross multiply
   1,588.93x = 2,191.52 × 1,392.10
4. Step 4: Simplify right side
   1,588.93x = 3,050,802.55
5. Step 5: Solve for x
   x = 3,050,802.55/1,588.93
6. Step 6: Final answer
   x = 1,920.04