Finding the Fourth Proportional to 116,621.27, 160,987.01 and 78,402.98

Step by Step Solution

1. Step 1: Write the proportion equation
   116,621.27 : 160,987.01 = 78,402.98 : x
2. Step 2: Convert to fraction form
   116,621.27/160,987.01 = 78,402.98/x
3. Step 3: Cross multiply
   116,621.27x = 160,987.01 × 78,402.98
4. Step 4: Simplify right side
   116,621.27x = 12,621,861,335.74
5. Step 5: Solve for x
   x = 12,621,861,335.74/116,621.27
6. Step 6: Final answer
   x = 108,229.50