Finding the Fourth Proportional to 128,736.72, 193,158.38 and 69,502.74

Step by Step Solution

1. Step 1: Write the proportion equation
   128,736.72 : 193,158.38 = 69,502.74 : x
2. Step 2: Convert to fraction form
   128,736.72/193,158.38 = 69,502.74/x
3. Step 3: Cross multiply
   128,736.72x = 193,158.38 × 69,502.74
4. Step 4: Simplify right side
   128,736.72x = 13,425,036,663.96
5. Step 5: Solve for x
   x = 13,425,036,663.96/128,736.72
6. Step 6: Final answer
   x = 104,282.89