Finding the Fourth Proportional to 156,021, 215,309.52 and 84,401.34

Step by Step Solution

1. Step 1: Write the proportion equation
   156,021 : 215,309.52 = 84,401.34 : x
2. Step 2: Convert to fraction form
   156,021/215,309.52 = 84,401.34/x
3. Step 3: Cross multiply
   156,021x = 215,309.52 × 84,401.34
4. Step 4: Simplify right side
   156,021x = 18,172,412,002.76
5. Step 5: Solve for x
   x = 18,172,412,002.76/156,021
6. Step 6: Final answer
   x = 116,474.14