Finding the Fourth Proportional to 52,128.32, 78,180.48 and 31,074.30

Step by Step Solution

1. Step 1: Write the proportion equation
   52,128.32 : 78,180.48 = 31,074.30 : x
2. Step 2: Convert to fraction form
   52,128.32/78,180.48 = 31,074.30/x
3. Step 3: Cross multiply
   52,128.32x = 78,180.48 × 31,074.30
4. Step 4: Simplify right side
   52,128.32x = 2,429,403,689.66
5. Step 5: Solve for x
   x = 2,429,403,689.66/52,128.32
6. Step 6: Final answer
   x = 46,604.30