Finding the Fourth Proportional to 78,065.91, 117,099.18 and 18,901.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,065.91 : 117,099.18 = 18,901.50 : x
2. Step 2: Convert to fraction form
   78,065.91/117,099.18 = 18,901.50/x
3. Step 3: Cross multiply
   78,065.91x = 117,099.18 × 18,901.50
4. Step 4: Simplify right side
   78,065.91x = 2,213,350,150.77
5. Step 5: Solve for x
   x = 2,213,350,150.77/78,065.91
6. Step 6: Final answer
   x = 28,352.33