Finding the Fourth Proportional to 1,200,111.57, 1,655,373.60 and 769,709.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,111.57 : 1,655,373.60 = 769,709.97 : x
2. Step 2: Convert to fraction form
   1,200,111.57/1,655,373.60 = 769,709.97/x
3. Step 3: Cross multiply
   1,200,111.57x = 1,655,373.60 × 769,709.97
4. Step 4: Simplify right side
   1,200,111.57x = 1,274,157,563,994.79
5. Step 5: Solve for x
   x = 1,274,157,563,994.79/1,200,111.57
6. Step 6: Final answer
   x = 1,061,699.26