Finding the Fourth Proportional to 124,015.34, 186,043.89 and 57,428.30

Step by Step Solution

1. Step 1: Write the proportion equation
   124,015.34 : 186,043.89 = 57,428.30 : x
2. Step 2: Convert to fraction form
   124,015.34/186,043.89 = 57,428.30/x
3. Step 3: Cross multiply
   124,015.34x = 186,043.89 × 57,428.30
4. Step 4: Simplify right side
   124,015.34x = 10,684,184,328.09
5. Step 5: Solve for x
   x = 10,684,184,328.09/124,015.34
6. Step 6: Final answer
   x = 86,152.12