Finding the Fourth Proportional to 42,981.32, 64,570.82 and 30,531.64

Step by Step Solution

1. Step 1: Write the proportion equation
   42,981.32 : 64,570.82 = 30,531.64 : x
2. Step 2: Convert to fraction form
   42,981.32/64,570.82 = 30,531.64/x
3. Step 3: Cross multiply
   42,981.32x = 64,570.82 × 30,531.64
4. Step 4: Simplify right side
   42,981.32x = 1,971,453,030.74
5. Step 5: Solve for x
   x = 1,971,453,030.74/42,981.32
6. Step 6: Final answer
   x = 45,867.67