Finding the Fourth Proportional to 1,077,118.72, 1,617,777.60 and 877,586.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077,118.72 : 1,617,777.60 = 877,586.56 : x
2. Step 2: Convert to fraction form
   1,077,118.72/1,617,777.60 = 877,586.56/x
3. Step 3: Cross multiply
   1,077,118.72x = 1,617,777.60 × 877,586.56
4. Step 4: Simplify right side
   1,077,118.72x = 1,419,739,878,829.06
5. Step 5: Solve for x
   x = 1,419,739,878,829.06/1,077,118.72
6. Step 6: Final answer
   x = 1,318,090.43