Finding the Fourth Proportional to 1,690.95, 2,538.25 and 1,420.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.95 : 2,538.25 = 1,420.01 : x
2. Step 2: Convert to fraction form
   1,690.95/2,538.25 = 1,420.01/x
3. Step 3: Cross multiply
   1,690.95x = 2,538.25 × 1,420.01
4. Step 4: Simplify right side
   1,690.95x = 3,604,327.69
5. Step 5: Solve for x
   x = 3,604,327.69/1,690.95
6. Step 6: Final answer
   x = 2,131.54