Finding the Fourth Proportional to 70,499.88, 105,777.48 and 31,029.30

Step by Step Solution

1. Step 1: Write the proportion equation
   70,499.88 : 105,777.48 = 31,029.30 : x
2. Step 2: Convert to fraction form
   70,499.88/105,777.48 = 31,029.30/x
3. Step 3: Cross multiply
   70,499.88x = 105,777.48 × 31,029.30
4. Step 4: Simplify right side
   70,499.88x = 3,282,201,160.16
5. Step 5: Solve for x
   x = 3,282,201,160.16/70,499.88
6. Step 6: Final answer
   x = 46,556.12