Finding the Fourth Proportional to 117,470, 162,047.34 and 72,158.19

Step by Step Solution

1. Step 1: Write the proportion equation
   117,470 : 162,047.34 = 72,158.19 : x
2. Step 2: Convert to fraction form
   117,470/162,047.34 = 72,158.19/x
3. Step 3: Cross multiply
   117,470x = 162,047.34 × 72,158.19
4. Step 4: Simplify right side
   117,470x = 11,693,042,748.71
5. Step 5: Solve for x
   x = 11,693,042,748.71/117,470
6. Step 6: Final answer
   x = 99,540.67