Finding the Fourth Proportional to 42,928.32, 64,376.32 and 17,970.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,928.32 : 64,376.32 = 17,970.12 : x
2. Step 2: Convert to fraction form
   42,928.32/64,376.32 = 17,970.12/x
3. Step 3: Cross multiply
   42,928.32x = 64,376.32 × 17,970.12
4. Step 4: Simplify right side
   42,928.32x = 1,156,850,195.56
5. Step 5: Solve for x
   x = 1,156,850,195.56/42,928.32
6. Step 6: Final answer
   x = 26,948.42