Finding the Fourth Proportional to 123,447, 170,356.86 and 66,858.78

Step by Step Solution

1. Step 1: Write the proportion equation
   123,447 : 170,356.86 = 66,858.78 : x
2. Step 2: Convert to fraction form
   123,447/170,356.86 = 66,858.78/x
3. Step 3: Cross multiply
   123,447x = 170,356.86 × 66,858.78
4. Step 4: Simplify right side
   123,447x = 11,389,851,824.23
5. Step 5: Solve for x
   x = 11,389,851,824.23/123,447
6. Step 6: Final answer
   x = 92,265.12