Finding the Fourth Proportional to 76,923.47, 106,159.72 and 42,938.57

Step by Step Solution

1. Step 1: Write the proportion equation
   76,923.47 : 106,159.72 = 42,938.57 : x
2. Step 2: Convert to fraction form
   76,923.47/106,159.72 = 42,938.57/x
3. Step 3: Cross multiply
   76,923.47x = 106,159.72 × 42,938.57
4. Step 4: Simplify right side
   76,923.47x = 4,558,346,568.40
5. Step 5: Solve for x
   x = 4,558,346,568.40/76,923.47
6. Step 6: Final answer
   x = 59,258.20