Finding the Fourth Proportional to 1,412.88, 1,947.86 and 1,191.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.88 : 1,947.86 = 1,191.45 : x
2. Step 2: Convert to fraction form
   1,412.88/1,947.86 = 1,191.45/x
3. Step 3: Cross multiply
   1,412.88x = 1,947.86 × 1,191.45
4. Step 4: Simplify right side
   1,412.88x = 2,320,777.80
5. Step 5: Solve for x
   x = 2,320,777.80/1,412.88
6. Step 6: Final answer
   x = 1,642.59