Finding the Fourth Proportional to 117,513.56, 162,194.28 and 72,215.30

Step by Step Solution

1. Step 1: Write the proportion equation
   117,513.56 : 162,194.28 = 72,215.30 : x
2. Step 2: Convert to fraction form
   117,513.56/162,194.28 = 72,215.30/x
3. Step 3: Cross multiply
   117,513.56x = 162,194.28 × 72,215.30
4. Step 4: Simplify right side
   117,513.56x = 11,712,908,588.48
5. Step 5: Solve for x
   x = 11,712,908,588.48/117,513.56
6. Step 6: Final answer
   x = 99,672.83