Finding the Fourth Proportional to 123,790.35, 170,915.76 and 83,560.49

Step by Step Solution

1. Step 1: Write the proportion equation
   123,790.35 : 170,915.76 = 83,560.49 : x
2. Step 2: Convert to fraction form
   123,790.35/170,915.76 = 83,560.49/x
3. Step 3: Cross multiply
   123,790.35x = 170,915.76 × 83,560.49
4. Step 4: Simplify right side
   123,790.35x = 14,281,803,842.47
5. Step 5: Solve for x
   x = 14,281,803,842.47/123,790.35
6. Step 6: Final answer
   x = 115,370.90