Finding the Fourth Proportional to 136,490.81, 188,541 and 123,758.42

Step by Step Solution

1. Step 1: Write the proportion equation
   136,490.81 : 188,541 = 123,758.42 : x
2. Step 2: Convert to fraction form
   136,490.81/188,541 = 123,758.42/x
3. Step 3: Cross multiply
   136,490.81x = 188,541 × 123,758.42
4. Step 4: Simplify right side
   136,490.81x = 23,333,535,322.52
5. Step 5: Solve for x
   x = 23,333,535,322.52/136,490.81
6. Step 6: Final answer
   x = 170,953.17