Finding the Fourth Proportional to 191,139.27, 286,743.46 and 78,756.96

Step by Step Solution

1. Step 1: Write the proportion equation
   191,139.27 : 286,743.46 = 78,756.96 : x
2. Step 2: Convert to fraction form
   191,139.27/286,743.46 = 78,756.96/x
3. Step 3: Cross multiply
   191,139.27x = 286,743.46 × 78,756.96
4. Step 4: Simplify right side
   191,139.27x = 22,583,043,209.48
5. Step 5: Solve for x
   x = 22,583,043,209.48/191,139.27
6. Step 6: Final answer
   x = 118,149.68