Finding the Fourth Proportional to 42,528.88, 58,688.88 and 23,147.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,528.88 : 58,688.88 = 23,147.20 : x
2. Step 2: Convert to fraction form
   42,528.88/58,688.88 = 23,147.20/x
3. Step 3: Cross multiply
   42,528.88x = 58,688.88 × 23,147.20
4. Step 4: Simplify right side
   42,528.88x = 1,358,483,243.14
5. Step 5: Solve for x
   x = 1,358,483,243.14/42,528.88
6. Step 6: Final answer
   x = 31,942.61