Finding the Fourth Proportional to 948,334.32, 1,308,820.91 and 621,921.83

Step by Step Solution

1. Step 1: Write the proportion equation
   948,334.32 : 1,308,820.91 = 621,921.83 : x
2. Step 2: Convert to fraction form
   948,334.32/1,308,820.91 = 621,921.83/x
3. Step 3: Cross multiply
   948,334.32x = 1,308,820.91 × 621,921.83
4. Step 4: Simplify right side
   948,334.32x = 813,984,300,316.32
5. Step 5: Solve for x
   x = 813,984,300,316.32/948,334.32
6. Step 6: Final answer
   x = 858,330.53