Finding the Fourth Proportional to 73,945.90, 102,055.91 and 42,117.76

Step by Step Solution

1. Step 1: Write the proportion equation
   73,945.90 : 102,055.91 = 42,117.76 : x
2. Step 2: Convert to fraction form
   73,945.90/102,055.91 = 42,117.76/x
3. Step 3: Cross multiply
   73,945.90x = 102,055.91 × 42,117.76
4. Step 4: Simplify right side
   73,945.90x = 4,298,366,323.96
5. Step 5: Solve for x
   x = 4,298,366,323.96/73,945.90
6. Step 6: Final answer
   x = 58,128.53