Finding the Fourth Proportional to 1,201,947.31, 1,658,819.15 and 766,380.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,201,947.31 : 1,658,819.15 = 766,380.12 : x
2. Step 2: Convert to fraction form
   1,201,947.31/1,658,819.15 = 766,380.12/x
3. Step 3: Cross multiply
   1,201,947.31x = 1,658,819.15 × 766,380.12
4. Step 4: Simplify right side
   1,201,947.31x = 1,271,286,019,235.30
5. Step 5: Solve for x
   x = 1,271,286,019,235.30/1,201,947.31
6. Step 6: Final answer
   x = 1,057,688.64