Finding the Fourth Proportional to 74,429.18, 102,706.31 and 42,590.78

Step by Step Solution

1. Step 1: Write the proportion equation
   74,429.18 : 102,706.31 = 42,590.78 : x
2. Step 2: Convert to fraction form
   74,429.18/102,706.31 = 42,590.78/x
3. Step 3: Cross multiply
   74,429.18x = 102,706.31 × 42,590.78
4. Step 4: Simplify right side
   74,429.18x = 4,374,341,853.82
5. Step 5: Solve for x
   x = 4,374,341,853.82/74,429.18
6. Step 6: Final answer
   x = 58,771.87