Finding the Fourth Proportional to 74,520.81, 102,838.23 and 42,261.57

Step by Step Solution

1. Step 1: Write the proportion equation
   74,520.81 : 102,838.23 = 42,261.57 : x
2. Step 2: Convert to fraction form
   74,520.81/102,838.23 = 42,261.57/x
3. Step 3: Cross multiply
   74,520.81x = 102,838.23 × 42,261.57
4. Step 4: Simplify right side
   74,520.81x = 4,346,105,055.82
5. Step 5: Solve for x
   x = 4,346,105,055.82/74,520.81
6. Step 6: Final answer
   x = 58,320.69