Finding the Fourth Proportional to 143,378.30, 215,030.55 and 59,162.40

Step by Step Solution

1. Step 1: Write the proportion equation
   143,378.30 : 215,030.55 = 59,162.40 : x
2. Step 2: Convert to fraction form
   143,378.30/215,030.55 = 59,162.40/x
3. Step 3: Cross multiply
   143,378.30x = 215,030.55 × 59,162.40
4. Step 4: Simplify right side
   143,378.30x = 12,721,723,300.39
5. Step 5: Solve for x
   x = 12,721,723,300.39/143,378.30
6. Step 6: Final answer
   x = 88,728.37