Finding the Fourth Proportional to 191,617.38, 287,300.91 and 91,774.38

Step by Step Solution

1. Step 1: Write the proportion equation
   191,617.38 : 287,300.91 = 91,774.38 : x
2. Step 2: Convert to fraction form
   191,617.38/287,300.91 = 91,774.38/x
3. Step 3: Cross multiply
   191,617.38x = 287,300.91 × 91,774.38
4. Step 4: Simplify right side
   191,617.38x = 26,366,862,888.69
5. Step 5: Solve for x
   x = 26,366,862,888.69/191,617.38
6. Step 6: Final answer
   x = 137,601.63