Finding the Fourth Proportional to 123,558.75, 170,513.69 and 69,840.56

Step by Step Solution

1. Step 1: Write the proportion equation
   123,558.75 : 170,513.69 = 69,840.56 : x
2. Step 2: Convert to fraction form
   123,558.75/170,513.69 = 69,840.56/x
3. Step 3: Cross multiply
   123,558.75x = 170,513.69 × 69,840.56
4. Step 4: Simplify right side
   123,558.75x = 11,908,771,597.27
5. Step 5: Solve for x
   x = 11,908,771,597.27/123,558.75
6. Step 6: Final answer
   x = 96,381.45