Finding the Fourth Proportional to 142,538.99, 213,870.49 and 89,352.86

Step by Step Solution

1. Step 1: Write the proportion equation
   142,538.99 : 213,870.49 = 89,352.86 : x
2. Step 2: Convert to fraction form
   142,538.99/213,870.49 = 89,352.86/x
3. Step 3: Cross multiply
   142,538.99x = 213,870.49 × 89,352.86
4. Step 4: Simplify right side
   142,538.99x = 19,109,938,658.37
5. Step 5: Solve for x
   x = 19,109,938,658.37/142,538.99
6. Step 6: Final answer
   x = 134,068.15