Finding the Fourth Proportional to 128,264.72, 192,469.56 and 69,098.96

Step by Step Solution

1. Step 1: Write the proportion equation
   128,264.72 : 192,469.56 = 69,098.96 : x
2. Step 2: Convert to fraction form
   128,264.72/192,469.56 = 69,098.96/x
3. Step 3: Cross multiply
   128,264.72x = 192,469.56 × 69,098.96
4. Step 4: Simplify right side
   128,264.72x = 13,299,446,427.66
5. Step 5: Solve for x
   x = 13,299,446,427.66/128,264.72
6. Step 6: Final answer
   x = 103,687.49