Finding the Fourth Proportional to 2,088.16, 3,128.18 and 991.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.16 : 3,128.18 = 991.01 : x
2. Step 2: Convert to fraction form
   2,088.16/3,128.18 = 991.01/x
3. Step 3: Cross multiply
   2,088.16x = 3,128.18 × 991.01
4. Step 4: Simplify right side
   2,088.16x = 3,100,052.71
5. Step 5: Solve for x
   x = 3,100,052.71/2,088.16
6. Step 6: Final answer
   x = 1,484.59