Finding the Fourth Proportional to 116,412.27, 160,521.80 and 78,620.91

Step by Step Solution

1. Step 1: Write the proportion equation
   116,412.27 : 160,521.80 = 78,620.91 : x
2. Step 2: Convert to fraction form
   116,412.27/160,521.80 = 78,620.91/x
3. Step 3: Cross multiply
   116,412.27x = 160,521.80 × 78,620.91
4. Step 4: Simplify right side
   116,412.27x = 12,620,369,597.73
5. Step 5: Solve for x
   x = 12,620,369,597.73/116,412.27
6. Step 6: Final answer
   x = 108,410.99