Finding the Fourth Proportional to 261,401.30, 392,064.88 and 83,885.34

Step by Step Solution

1. Step 1: Write the proportion equation
   261,401.30 : 392,064.88 = 83,885.34 : x
2. Step 2: Convert to fraction form
   261,401.30/392,064.88 = 83,885.34/x
3. Step 3: Cross multiply
   261,401.30x = 392,064.88 × 83,885.34
4. Step 4: Simplify right side
   261,401.30x = 32,888,495,760.86
5. Step 5: Solve for x
   x = 32,888,495,760.86/261,401.30
6. Step 6: Final answer
   x = 125,816.11