Finding the Fourth Proportional to 71,110.56, 106,667.12 and 39,878.56

Step by Step Solution

1. Step 1: Write the proportion equation
   71,110.56 : 106,667.12 = 39,878.56 : x
2. Step 2: Convert to fraction form
   71,110.56/106,667.12 = 39,878.56/x
3. Step 3: Cross multiply
   71,110.56x = 106,667.12 × 39,878.56
4. Step 4: Simplify right side
   71,110.56x = 4,253,731,144.95
5. Step 5: Solve for x
   x = 4,253,731,144.95/71,110.56
6. Step 6: Final answer
   x = 59,818.56