Finding the Fourth Proportional to 42,980.16, 64,411.28 and 32,441.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,980.16 : 64,411.28 = 32,441.20 : x
2. Step 2: Convert to fraction form
   42,980.16/64,411.28 = 32,441.20/x
3. Step 3: Cross multiply
   42,980.16x = 64,411.28 × 32,441.20
4. Step 4: Simplify right side
   42,980.16x = 2,089,579,216.74
5. Step 5: Solve for x
   x = 2,089,579,216.74/42,980.16
6. Step 6: Final answer
   x = 48,617.30