Finding the Fourth Proportional to 42,970.32, 64,554.30 and 30,520.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,970.32 : 64,554.30 = 30,520.62 : x
2. Step 2: Convert to fraction form
   42,970.32/64,554.30 = 30,520.62/x
3. Step 3: Cross multiply
   42,970.32x = 64,554.30 × 30,520.62
4. Step 4: Simplify right side
   42,970.32x = 1,970,237,259.67
5. Step 5: Solve for x
   x = 1,970,237,259.67/42,970.32
6. Step 6: Final answer
   x = 45,851.12