Finding the Fourth Proportional to 712,870.67, 983,431.78 and 631,282.10

Step by Step Solution

1. Step 1: Write the proportion equation
   712,870.67 : 983,431.78 = 631,282.10 : x
2. Step 2: Convert to fraction form
   712,870.67/983,431.78 = 631,282.10/x
3. Step 3: Cross multiply
   712,870.67x = 983,431.78 × 631,282.10
4. Step 4: Simplify right side
   712,870.67x = 620,822,872,789.77
5. Step 5: Solve for x
   x = 620,822,872,789.77/712,870.67
6. Step 6: Final answer
   x = 870,877.28