Finding the Fourth Proportional to 156,436.76, 215,880.72 and 84,816.56

Step by Step Solution

1. Step 1: Write the proportion equation
   156,436.76 : 215,880.72 = 84,816.56 : x
2. Step 2: Convert to fraction form
   156,436.76/215,880.72 = 84,816.56/x
3. Step 3: Cross multiply
   156,436.76x = 215,880.72 × 84,816.56
4. Step 4: Simplify right side
   156,436.76x = 18,310,260,040.72
5. Step 5: Solve for x
   x = 18,310,260,040.72/156,436.76
6. Step 6: Final answer
   x = 117,045.76