Finding the Fourth Proportional to 155,311.32, 232,967.30 and 42,991.86

Step by Step Solution

1. Step 1: Write the proportion equation
   155,311.32 : 232,967.30 = 42,991.86 : x
2. Step 2: Convert to fraction form
   155,311.32/232,967.30 = 42,991.86/x
3. Step 3: Cross multiply
   155,311.32x = 232,967.30 × 42,991.86
4. Step 4: Simplify right side
   155,311.32x = 10,015,697,331.22
5. Step 5: Solve for x
   x = 10,015,697,331.22/155,311.32
6. Step 6: Final answer
   x = 64,487.88