Finding the Fourth Proportional to 161,890.29, 242,870.00 and 56,715.57

Step by Step Solution

1. Step 1: Write the proportion equation
   161,890.29 : 242,870.00 = 56,715.57 : x
2. Step 2: Convert to fraction form
   161,890.29/242,870.00 = 56,715.57/x
3. Step 3: Cross multiply
   161,890.29x = 242,870.00 × 56,715.57
4. Step 4: Simplify right side
   161,890.29x = 13,774,510,202.32
5. Step 5: Solve for x
   x = 13,774,510,202.32/161,890.29
6. Step 6: Final answer
   x = 85,085.46