Finding the Fourth Proportional to 191,061.21, 286,594.57 and 72,739.05

Step by Step Solution

1. Step 1: Write the proportion equation
   191,061.21 : 286,594.57 = 72,739.05 : x
2. Step 2: Convert to fraction form
   191,061.21/286,594.57 = 72,739.05/x
3. Step 3: Cross multiply
   191,061.21x = 286,594.57 × 72,739.05
4. Step 4: Simplify right side
   191,061.21x = 20,846,615,773.15
5. Step 5: Solve for x
   x = 20,846,615,773.15/191,061.21
6. Step 6: Final answer
   x = 109,109.62