Finding the Fourth Proportional to 106,139, 146,472.54 and 57,741.37

Step by Step Solution

1. Step 1: Write the proportion equation
   106,139 : 146,472.54 = 57,741.37 : x
2. Step 2: Convert to fraction form
   106,139/146,472.54 = 57,741.37/x
3. Step 3: Cross multiply
   106,139x = 146,472.54 × 57,741.37
4. Step 4: Simplify right side
   106,139x = 8,457,525,126.98
5. Step 5: Solve for x
   x = 8,457,525,126.98/106,139
6. Step 6: Final answer
   x = 79,683.48