Finding the Fourth Proportional to 74,379.72, 102,640.32 and 42,109.32

Step by Step Solution

1. Step 1: Write the proportion equation
   74,379.72 : 102,640.32 = 42,109.32 : x
2. Step 2: Convert to fraction form
   74,379.72/102,640.32 = 42,109.32/x
3. Step 3: Cross multiply
   74,379.72x = 102,640.32 × 42,109.32
4. Step 4: Simplify right side
   74,379.72x = 4,322,114,079.78
5. Step 5: Solve for x
   x = 4,322,114,079.78/74,379.72
6. Step 6: Final answer
   x = 58,108.77