Finding the Fourth Proportional to 102,113.69, 140,915.63 and 57,401.69

Step by Step Solution

1. Step 1: Write the proportion equation
   102,113.69 : 140,915.63 = 57,401.69 : x
2. Step 2: Convert to fraction form
   102,113.69/140,915.63 = 57,401.69/x
3. Step 3: Cross multiply
   102,113.69x = 140,915.63 × 57,401.69
4. Step 4: Simplify right side
   102,113.69x = 8,088,794,748.34
5. Step 5: Solve for x
   x = 8,088,794,748.34/102,113.69
6. Step 6: Final answer
   x = 79,213.62