Finding the Fourth Proportional to 92,633.20, 138,991.30 and 42,686.56

Step by Step Solution

1. Step 1: Write the proportion equation
   92,633.20 : 138,991.30 = 42,686.56 : x
2. Step 2: Convert to fraction form
   92,633.20/138,991.30 = 42,686.56/x
3. Step 3: Cross multiply
   92,633.20x = 138,991.30 × 42,686.56
4. Step 4: Simplify right side
   92,633.20x = 5,933,060,466.93
5. Step 5: Solve for x
   x = 5,933,060,466.93/92,633.20
6. Step 6: Final answer
   x = 64,048.96