Finding the Fourth Proportional to 70,607.40, 105,938.82 and 31,137

Step by Step Solution

1. Step 1: Write the proportion equation
   70,607.40 : 105,938.82 = 31,137 : x
2. Step 2: Convert to fraction form
   70,607.40/105,938.82 = 31,137/x
3. Step 3: Cross multiply
   70,607.40x = 105,938.82 × 31,137
4. Step 4: Simplify right side
   70,607.40x = 3,298,617,038.34
5. Step 5: Solve for x
   x = 3,298,617,038.34/70,607.40
6. Step 6: Final answer
   x = 46,717.72