Finding the Fourth Proportional to 78.34, 117.52 and 34.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78.34 : 117.52 = 34.99 : x
2. Step 2: Convert to fraction form
   78.34/117.52 = 34.99/x
3. Step 3: Cross multiply
   78.34x = 117.52 × 34.99
4. Step 4: Simplify right side
   78.34x = 4,112.02
5. Step 5: Solve for x
   x = 4,112.02/78.34
6. Step 6: Final answer
   x = 52.49