Finding the Fourth Proportional to 116,089.39, 173,911.60 and 78,584.77

Step by Step Solution

1. Step 1: Write the proportion equation
   116,089.39 : 173,911.60 = 78,584.77 : x
2. Step 2: Convert to fraction form
   116,089.39/173,911.60 = 78,584.77/x
3. Step 3: Cross multiply
   116,089.39x = 173,911.60 × 78,584.77
4. Step 4: Simplify right side
   116,089.39x = 13,666,803,086.33
5. Step 5: Solve for x
   x = 13,666,803,086.33/116,089.39
6. Step 6: Final answer
   x = 117,726.55