Finding the Fourth Proportional to 78,131.60, 117,529.98 and 70,824.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,131.60 : 117,529.98 = 70,824.18 : x
2. Step 2: Convert to fraction form
   78,131.60/117,529.98 = 70,824.18/x
3. Step 3: Cross multiply
   78,131.60x = 117,529.98 × 70,824.18
4. Step 4: Simplify right side
   78,131.60x = 8,323,964,458.92
5. Step 5: Solve for x
   x = 8,323,964,458.92/78,131.60
6. Step 6: Final answer
   x = 106,537.74