Finding the Fourth Proportional to 147,123.38, 220,406.53 and 86,971.77

Step by Step Solution

1. Step 1: Write the proportion equation
   147,123.38 : 220,406.53 = 86,971.77 : x
2. Step 2: Convert to fraction form
   147,123.38/220,406.53 = 86,971.77/x
3. Step 3: Cross multiply
   147,123.38x = 220,406.53 × 86,971.77
4. Step 4: Simplify right side
   147,123.38x = 19,169,145,816.23
5. Step 5: Solve for x
   x = 19,169,145,816.23/147,123.38
6. Step 6: Final answer
   x = 130,292.99