Finding the Fourth Proportional to 128,570.17, 192,928.16 and 69,404.53

Step by Step Solution

1. Step 1: Write the proportion equation
   128,570.17 : 192,928.16 = 69,404.53 : x
2. Step 2: Convert to fraction form
   128,570.17/192,928.16 = 69,404.53/x
3. Step 3: Cross multiply
   128,570.17x = 192,928.16 × 69,404.53
4. Step 4: Simplify right side
   128,570.17x = 13,390,088,268.56
5. Step 5: Solve for x
   x = 13,390,088,268.56/128,570.17
6. Step 6: Final answer
   x = 104,146.15