Finding the Fourth Proportional to 156,393, 215,822.72 and 84,772.70

Step by Step Solution

1. Step 1: Write the proportion equation
   156,393 : 215,822.72 = 84,772.70 : x
2. Step 2: Convert to fraction form
   156,393/215,822.72 = 84,772.70/x
3. Step 3: Cross multiply
   156,393x = 215,822.72 × 84,772.70
4. Step 4: Simplify right side
   156,393x = 18,295,874,695.74
5. Step 5: Solve for x
   x = 18,295,874,695.74/156,393
6. Step 6: Final answer
   x = 116,986.53