Finding the Fourth Proportional to 191,713.48, 287,570.42 and 191,436.59

Step by Step Solution

1. Step 1: Write the proportion equation
   191,713.48 : 287,570.42 = 191,436.59 : x
2. Step 2: Convert to fraction form
   191,713.48/287,570.42 = 191,436.59/x
3. Step 3: Cross multiply
   191,713.48x = 287,570.42 × 191,436.59
4. Step 4: Simplify right side
   191,713.48x = 55,051,499,632.48
5. Step 5: Solve for x
   x = 55,051,499,632.48/191,713.48
6. Step 6: Final answer
   x = 287,155.09