Finding the Fourth Proportional to 123,365.67, 170,271.62 and 78,103.99

Step by Step Solution

1. Step 1: Write the proportion equation
   123,365.67 : 170,271.62 = 78,103.99 : x
2. Step 2: Convert to fraction form
   123,365.67/170,271.62 = 78,103.99/x
3. Step 3: Cross multiply
   123,365.67x = 170,271.62 × 78,103.99
4. Step 4: Simplify right side
   123,365.67x = 13,298,892,905.76
5. Step 5: Solve for x
   x = 13,298,892,905.76/123,365.67
6. Step 6: Final answer
   x = 107,800.60