Finding the Fourth Proportional to 825,871.74, 1,139,858.59 and 538,893.60

Step by Step Solution

1. Step 1: Write the proportion equation
   825,871.74 : 1,139,858.59 = 538,893.60 : x
2. Step 2: Convert to fraction form
   825,871.74/1,139,858.59 = 538,893.60/x
3. Step 3: Cross multiply
   825,871.74x = 1,139,858.59 × 538,893.60
4. Step 4: Simplify right side
   825,871.74x = 614,262,499,056.02
5. Step 5: Solve for x
   x = 614,262,499,056.02/825,871.74
6. Step 6: Final answer
   x = 743,774.69