Finding the Fourth Proportional to 191,016.99, 286,535 and 72,697.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,016.99 : 286,535 = 72,697.50 : x
2. Step 2: Convert to fraction form
   191,016.99/286,535 = 72,697.50/x
3. Step 3: Cross multiply
   191,016.99x = 286,535 × 72,697.50
4. Step 4: Simplify right side
   191,016.99x = 20,830,378,162.50
5. Step 5: Solve for x
   x = 20,830,378,162.50/191,016.99
6. Step 6: Final answer
   x = 109,049.87