Finding the Fourth Proportional to 128,250.72, 192,448.56 and 69,084.96

Step by Step Solution

1. Step 1: Write the proportion equation
   128,250.72 : 192,448.56 = 69,084.96 : x
2. Step 2: Convert to fraction form
   128,250.72/192,448.56 = 69,084.96/x
3. Step 3: Cross multiply
   128,250.72x = 192,448.56 × 69,084.96
4. Step 4: Simplify right side
   128,250.72x = 13,295,301,069.66
5. Step 5: Solve for x
   x = 13,295,301,069.66/128,250.72
6. Step 6: Final answer
   x = 103,666.48