Finding the Fourth Proportional to 525,460.50, 725,152.77 and 286,996.50

Step by Step Solution

1. Step 1: Write the proportion equation
   525,460.50 : 725,152.77 = 286,996.50 : x
2. Step 2: Convert to fraction form
   525,460.50/725,152.77 = 286,996.50/x
3. Step 3: Cross multiply
   525,460.50x = 725,152.77 × 286,996.50
4. Step 4: Simplify right side
   525,460.50x = 208,116,306,955.31
5. Step 5: Solve for x
   x = 208,116,306,955.31/525,460.50
6. Step 6: Final answer
   x = 396,064.61