Finding the Fourth Proportional to 64,489.92, 88,973.28 and 42,146.88

Step by Step Solution

1. Step 1: Write the proportion equation
   64,489.92 : 88,973.28 = 42,146.88 : x
2. Step 2: Convert to fraction form
   64,489.92/88,973.28 = 42,146.88/x
3. Step 3: Cross multiply
   64,489.92x = 88,973.28 × 42,146.88
4. Step 4: Simplify right side
   64,489.92x = 3,749,946,155.37
5. Step 5: Solve for x
   x = 3,749,946,155.37/64,489.92
6. Step 6: Final answer
   x = 58,147.79