Finding the Fourth Proportional to 37,915.32, 52,323.68 and 20,920.30

Step by Step Solution

1. Step 1: Write the proportion equation
   37,915.32 : 52,323.68 = 20,920.30 : x
2. Step 2: Convert to fraction form
   37,915.32/52,323.68 = 20,920.30/x
3. Step 3: Cross multiply
   37,915.32x = 52,323.68 × 20,920.30
4. Step 4: Simplify right side
   37,915.32x = 1,094,626,978.10
5. Step 5: Solve for x
   x = 1,094,626,978.10/37,915.32
6. Step 6: Final answer
   x = 28,870.31