Finding the Fourth Proportional to 1,315,978.14, 1,815,940.47 and 772,057.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315,978.14 : 1,815,940.47 = 772,057.02 : x
2. Step 2: Convert to fraction form
   1,315,978.14/1,815,940.47 = 772,057.02/x
3. Step 3: Cross multiply
   1,315,978.14x = 1,815,940.47 × 772,057.02
4. Step 4: Simplify right side
   1,315,978.14x = 1,402,009,587,765.60
5. Step 5: Solve for x
   x = 1,402,009,587,765.60/1,315,978.14
6. Step 6: Final answer
   x = 1,065,374.53