Finding the Fourth Proportional to 116,317.32, 160,578.98 and 78,276.88

Step by Step Solution

1. Step 1: Write the proportion equation
   116,317.32 : 160,578.98 = 78,276.88 : x
2. Step 2: Convert to fraction form
   116,317.32/160,578.98 = 78,276.88/x
3. Step 3: Cross multiply
   116,317.32x = 160,578.98 × 78,276.88
4. Step 4: Simplify right side
   116,317.32x = 12,569,621,547.98
5. Step 5: Solve for x
   x = 12,569,621,547.98/116,317.32
6. Step 6: Final answer
   x = 108,063.20