Finding the Fourth Proportional to 120,362.81, 166,106.36 and 72,615.13

Step by Step Solution

1. Step 1: Write the proportion equation
   120,362.81 : 166,106.36 = 72,615.13 : x
2. Step 2: Convert to fraction form
   120,362.81/166,106.36 = 72,615.13/x
3. Step 3: Cross multiply
   120,362.81x = 166,106.36 × 72,615.13
4. Step 4: Simplify right side
   120,362.81x = 12,061,834,691.50
5. Step 5: Solve for x
   x = 12,061,834,691.50/120,362.81
6. Step 6: Final answer
   x = 100,212.31