Finding the Fourth Proportional to 290,846.34, 436,256.82 and 91,162.17

Step by Step Solution

1. Step 1: Write the proportion equation
   290,846.34 : 436,256.82 = 91,162.17 : x
2. Step 2: Convert to fraction form
   290,846.34/436,256.82 = 91,162.17/x
3. Step 3: Cross multiply
   290,846.34x = 436,256.82 × 91,162.17
4. Step 4: Simplify right side
   290,846.34x = 39,770,118,388.50
5. Step 5: Solve for x
   x = 39,770,118,388.50/290,846.34
6. Step 6: Final answer
   x = 136,739.28