Finding the Fourth Proportional to 117,387.05, 162,019.71 and 72,088.83

Step by Step Solution

1. Step 1: Write the proportion equation
   117,387.05 : 162,019.71 = 72,088.83 : x
2. Step 2: Convert to fraction form
   117,387.05/162,019.71 = 72,088.83/x
3. Step 3: Cross multiply
   117,387.05x = 162,019.71 × 72,088.83
4. Step 4: Simplify right side
   117,387.05x = 11,679,811,330.84
5. Step 5: Solve for x
   x = 11,679,811,330.84/117,387.05
6. Step 6: Final answer
   x = 99,498.30