Finding the Fourth Proportional to 935,870.15, 1,291,659.61 and 528,087.60

Step by Step Solution

1. Step 1: Write the proportion equation
   935,870.15 : 1,291,659.61 = 528,087.60 : x
2. Step 2: Convert to fraction form
   935,870.15/1,291,659.61 = 528,087.60/x
3. Step 3: Cross multiply
   935,870.15x = 1,291,659.61 × 528,087.60
4. Step 4: Simplify right side
   935,870.15x = 682,109,423,461.84
5. Step 5: Solve for x
   x = 682,109,423,461.84/935,870.15
6. Step 6: Final answer
   x = 728,850.50