Finding the Fourth Proportional to 155,030.29, 213,944.05 and 87,061.98

Step by Step Solution

1. Step 1: Write the proportion equation
   155,030.29 : 213,944.05 = 87,061.98 : x
2. Step 2: Convert to fraction form
   155,030.29/213,944.05 = 87,061.98/x
3. Step 3: Cross multiply
   155,030.29x = 213,944.05 × 87,061.98
4. Step 4: Simplify right side
   155,030.29x = 18,626,391,849.70
5. Step 5: Solve for x
   x = 18,626,391,849.70/155,030.29
6. Step 6: Final answer
   x = 120,146.79