Finding the Fourth Proportional to 42,989.96, 64,483.32 and 17,688.54

Step by Step Solution

1. Step 1: Write the proportion equation
   42,989.96 : 64,483.32 = 17,688.54 : x
2. Step 2: Convert to fraction form
   42,989.96/64,483.32 = 17,688.54/x
3. Step 3: Cross multiply
   42,989.96x = 64,483.32 × 17,688.54
4. Step 4: Simplify right side
   42,989.96x = 1,140,615,785.15
5. Step 5: Solve for x
   x = 1,140,615,785.15/42,989.96
6. Step 6: Final answer
   x = 26,532.14