Finding the Fourth Proportional to 76,436.16, 105,482.78 and 42,445.32

Step by Step Solution

1. Step 1: Write the proportion equation
   76,436.16 : 105,482.78 = 42,445.32 : x
2. Step 2: Convert to fraction form
   76,436.16/105,482.78 = 42,445.32/x
3. Step 3: Cross multiply
   76,436.16x = 105,482.78 × 42,445.32
4. Step 4: Simplify right side
   76,436.16x = 4,477,250,351.59
5. Step 5: Solve for x
   x = 4,477,250,351.59/76,436.16
6. Step 6: Final answer
   x = 58,575.03