Finding the Fourth Proportional to 57,115.10, 78,927.28 and 42,943.34

Step by Step Solution

1. Step 1: Write the proportion equation
   57,115.10 : 78,927.28 = 42,943.34 : x
2. Step 2: Convert to fraction form
   57,115.10/78,927.28 = 42,943.34/x
3. Step 3: Cross multiply
   57,115.10x = 78,927.28 × 42,943.34
4. Step 4: Simplify right side
   57,115.10x = 3,389,401,020.32
5. Step 5: Solve for x
   x = 3,389,401,020.32/57,115.10
6. Step 6: Final answer
   x = 59,343.34