Finding the Fourth Proportional to 76,538.43, 105,640.16 and 42,558.84

Step by Step Solution

1. Step 1: Write the proportion equation
   76,538.43 : 105,640.16 = 42,558.84 : x
2. Step 2: Convert to fraction form
   76,538.43/105,640.16 = 42,558.84/x
3. Step 3: Cross multiply
   76,538.43x = 105,640.16 × 42,558.84
4. Step 4: Simplify right side
   76,538.43x = 4,495,922,667.01
5. Step 5: Solve for x
   x = 4,495,922,667.01/76,538.43
6. Step 6: Final answer
   x = 58,740.72