Finding the Fourth Proportional to 100.86, 151.34 and 43.10

Step by Step Solution

1. Step 1: Write the proportion equation
   100.86 : 151.34 = 43.10 : x
2. Step 2: Convert to fraction form
   100.86/151.34 = 43.10/x
3. Step 3: Cross multiply
   100.86x = 151.34 × 43.10
4. Step 4: Simplify right side
   100.86x = 6,522.51
5. Step 5: Solve for x
   x = 6,522.51/100.86
6. Step 6: Final answer
   x = 64.67