Finding the Fourth Proportional to 85,699.10, 128,597.25 and 46,255.34

Step by Step Solution

1. Step 1: Write the proportion equation
   85,699.10 : 128,597.25 = 46,255.34 : x
2. Step 2: Convert to fraction form
   85,699.10/128,597.25 = 46,255.34/x
3. Step 3: Cross multiply
   85,699.10x = 128,597.25 × 46,255.34
4. Step 4: Simplify right side
   85,699.10x = 5,948,308,878.83
5. Step 5: Solve for x
   x = 5,948,308,878.83/85,699.10
6. Step 6: Final answer
   x = 69,409.24