Finding the Fourth Proportional to 1,408,743.31, 2,113,446.72 and 1,121,640.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408,743.31 : 2,113,446.72 = 1,121,640.82 : x
2. Step 2: Convert to fraction form
   1,408,743.31/2,113,446.72 = 1,121,640.82/x
3. Step 3: Cross multiply
   1,408,743.31x = 2,113,446.72 × 1,121,640.82
4. Step 4: Simplify right side
   1,408,743.31x = 2,370,528,112,047.11
5. Step 5: Solve for x
   x = 2,370,528,112,047.11/1,408,743.31
6. Step 6: Final answer
   x = 1,682,725.37