Finding the Fourth Proportional to 123,611.60, 185,404.56 and 83,885.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123,611.60 : 185,404.56 = 83,885.60 : x
2. Step 2: Convert to fraction form
   123,611.60/185,404.56 = 83,885.60/x
3. Step 3: Cross multiply
   123,611.60x = 185,404.56 × 83,885.60
4. Step 4: Simplify right side
   123,611.60x = 15,552,772,758.34
5. Step 5: Solve for x
   x = 15,552,772,758.34/123,611.60
6. Step 6: Final answer
   x = 125,819.69