Finding the Fourth Proportional to 42,521.88, 64,029.84 and 31,506.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,521.88 : 64,029.84 = 31,506.60 : x
2. Step 2: Convert to fraction form
   42,521.88/64,029.84 = 31,506.60/x
3. Step 3: Cross multiply
   42,521.88x = 64,029.84 × 31,506.60
4. Step 4: Simplify right side
   42,521.88x = 2,017,362,556.94
5. Step 5: Solve for x
   x = 2,017,362,556.94/42,521.88
6. Step 6: Final answer
   x = 47,442.93