Finding the Fourth Proportional to 1,888.31, 2,830.61 and 1,272.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,888.31 : 2,830.61 = 1,272.17 : x
2. Step 2: Convert to fraction form
   1,888.31/2,830.61 = 1,272.17/x
3. Step 3: Cross multiply
   1,888.31x = 2,830.61 × 1,272.17
4. Step 4: Simplify right side
   1,888.31x = 3,601,027.38
5. Step 5: Solve for x
   x = 3,601,027.38/1,888.31
6. Step 6: Final answer
   x = 1,907.01