Finding the Fourth Proportional to 291,096.89, 436,663.86 and 91,425.16

Step by Step Solution

1. Step 1: Write the proportion equation
   291,096.89 : 436,663.86 = 91,425.16 : x
2. Step 2: Convert to fraction form
   291,096.89/436,663.86 = 91,425.16/x
3. Step 3: Cross multiply
   291,096.89x = 436,663.86 × 91,425.16
4. Step 4: Simplify right side
   291,096.89x = 39,922,063,266.72
5. Step 5: Solve for x
   x = 39,922,063,266.72/291,096.89
6. Step 6: Final answer
   x = 137,143.56