Finding the Fourth Proportional to 107,189.72, 160,880.95 and 78,762.83

Step by Step Solution

1. Step 1: Write the proportion equation
   107,189.72 : 160,880.95 = 78,762.83 : x
2. Step 2: Convert to fraction form
   107,189.72/160,880.95 = 78,762.83/x
3. Step 3: Cross multiply
   107,189.72x = 160,880.95 × 78,762.83
4. Step 4: Simplify right side
   107,189.72x = 12,671,437,913.78
5. Step 5: Solve for x
   x = 12,671,437,913.78/107,189.72
6. Step 6: Final answer
   x = 118,215.05