Finding the Fourth Proportional to 102,994.34, 154,513.55 and 31,915.40

Step by Step Solution

1. Step 1: Write the proportion equation
   102,994.34 : 154,513.55 = 31,915.40 : x
2. Step 2: Convert to fraction form
   102,994.34/154,513.55 = 31,915.40/x
3. Step 3: Cross multiply
   102,994.34x = 154,513.55 × 31,915.40
4. Step 4: Simplify right side
   102,994.34x = 4,931,360,821.53
5. Step 5: Solve for x
   x = 4,931,360,821.53/102,994.34
6. Step 6: Final answer
   x = 47,879.92