Finding the Fourth Proportional to 249,667.31, 344,540.89 and 136,490.06

Step by Step Solution

1. Step 1: Write the proportion equation
   249,667.31 : 344,540.89 = 136,490.06 : x
2. Step 2: Convert to fraction form
   249,667.31/344,540.89 = 136,490.06/x
3. Step 3: Cross multiply
   249,667.31x = 344,540.89 × 136,490.06
4. Step 4: Simplify right side
   249,667.31x = 47,026,407,780.52
5. Step 5: Solve for x
   x = 47,026,407,780.52/249,667.31
6. Step 6: Final answer
   x = 188,356.29