Finding the Fourth Proportional to 123,128.14, 169,906.64 and 69,426.34

Step by Step Solution

1. Step 1: Write the proportion equation
   123,128.14 : 169,906.64 = 69,426.34 : x
2. Step 2: Convert to fraction form
   123,128.14/169,906.64 = 69,426.34/x
3. Step 3: Cross multiply
   123,128.14x = 169,906.64 × 69,426.34
4. Step 4: Simplify right side
   123,128.14x = 11,795,996,156.90
5. Step 5: Solve for x
   x = 11,795,996,156.90/123,128.14
6. Step 6: Final answer
   x = 95,802.60