Finding the Fourth Proportional to 136,231.31, 204,214.43 and 65,135.47

Step by Step Solution

1. Step 1: Write the proportion equation
   136,231.31 : 204,214.43 = 65,135.47 : x
2. Step 2: Convert to fraction form
   136,231.31/204,214.43 = 65,135.47/x
3. Step 3: Cross multiply
   136,231.31x = 204,214.43 × 65,135.47
4. Step 4: Simplify right side
   136,231.31x = 13,301,602,064.89
5. Step 5: Solve for x
   x = 13,301,602,064.89/136,231.31
6. Step 6: Final answer
   x = 97,639.83