Finding the Fourth Proportional to 92,057, 138,087.20 and 28,875.72

Step by Step Solution

1. Step 1: Write the proportion equation
   92,057 : 138,087.20 = 28,875.72 : x
2. Step 2: Convert to fraction form
   92,057/138,087.20 = 28,875.72/x
3. Step 3: Cross multiply
   92,057x = 138,087.20 × 28,875.72
4. Step 4: Simplify right side
   92,057x = 3,987,367,322.78
5. Step 5: Solve for x
   x = 3,987,367,322.78/92,057
6. Step 6: Final answer
   x = 43,314.11