Finding the Fourth Proportional to 689,895, 952,054.86 and 388,089

Step by Step Solution

1. Step 1: Write the proportion equation
   689,895 : 952,054.86 = 388,089 : x
2. Step 2: Convert to fraction form
   689,895/952,054.86 = 388,089/x
3. Step 3: Cross multiply
   689,895x = 952,054.86 × 388,089
4. Step 4: Simplify right side
   689,895x = 369,482,018,562.54
5. Step 5: Solve for x
   x = 369,482,018,562.54/689,895
6. Step 6: Final answer
   x = 535,562.68