Finding the Fourth Proportional to 78,336.31, 108,106.32 and 42,528.65

Step by Step Solution

1. Step 1: Write the proportion equation
   78,336.31 : 108,106.32 = 42,528.65 : x
2. Step 2: Convert to fraction form
   78,336.31/108,106.32 = 42,528.65/x
3. Step 3: Cross multiply
   78,336.31x = 108,106.32 × 42,528.65
4. Step 4: Simplify right side
   78,336.31x = 4,597,616,116.33
5. Step 5: Solve for x
   x = 4,597,616,116.33/78,336.31
6. Step 6: Final answer
   x = 58,690.74