Finding the Fourth Proportional to 76,312.72, 105,311.56 and 42,326.42

Step by Step Solution

1. Step 1: Write the proportion equation
   76,312.72 : 105,311.56 = 42,326.42 : x
2. Step 2: Convert to fraction form
   76,312.72/105,311.56 = 42,326.42/x
3. Step 3: Cross multiply
   76,312.72x = 105,311.56 × 42,326.42
4. Step 4: Simplify right side
   76,312.72x = 4,457,460,647.36
5. Step 5: Solve for x
   x = 4,457,460,647.36/76,312.72
6. Step 6: Final answer
   x = 58,410.45