Finding the Fourth Proportional to 76,123.70, 105,048.60 and 42,131.34

Step by Step Solution

1. Step 1: Write the proportion equation
   76,123.70 : 105,048.60 = 42,131.34 : x
2. Step 2: Convert to fraction form
   76,123.70/105,048.60 = 42,131.34/x
3. Step 3: Cross multiply
   76,123.70x = 105,048.60 × 42,131.34
4. Step 4: Simplify right side
   76,123.70x = 4,425,838,125.13
5. Step 5: Solve for x
   x = 4,425,838,125.13/76,123.70
6. Step 6: Final answer
   x = 58,140.08