Finding the Fourth Proportional to 78.53, 117.98 and 59.45

Step by Step Solution

1. Step 1: Write the proportion equation
   78.53 : 117.98 = 59.45 : x
2. Step 2: Convert to fraction form
   78.53/117.98 = 59.45/x
3. Step 3: Cross multiply
   78.53x = 117.98 × 59.45
4. Step 4: Simplify right side
   78.53x = 7,013.61
5. Step 5: Solve for x
   x = 7,013.61/78.53
6. Step 6: Final answer
   x = 89.31