Finding the Fourth Proportional to 136,425.56, 188,345.31 and 90,547.42

Step by Step Solution

1. Step 1: Write the proportion equation
   136,425.56 : 188,345.31 = 90,547.42 : x
2. Step 2: Convert to fraction form
   136,425.56/188,345.31 = 90,547.42/x
3. Step 3: Cross multiply
   136,425.56x = 188,345.31 × 90,547.42
4. Step 4: Simplify right side
   136,425.56x = 17,054,181,889.60
5. Step 5: Solve for x
   x = 17,054,181,889.60/136,425.56
6. Step 6: Final answer
   x = 125,007.23