Finding the Fourth Proportional to 1,318,238.72, 1,818,528 and 781,314.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,318,238.72 : 1,818,528 = 781,314.56 : x
2. Step 2: Convert to fraction form
   1,318,238.72/1,818,528 = 781,314.56/x
3. Step 3: Cross multiply
   1,318,238.72x = 1,818,528 × 781,314.56
4. Step 4: Simplify right side
   1,318,238.72x = 1,420,842,404,167.68
5. Step 5: Solve for x
   x = 1,420,842,404,167.68/1,318,238.72
6. Step 6: Final answer
   x = 1,077,833.92