Finding the Fourth Proportional to 74,458, 102,749.72 and 42,624.78

Step by Step Solution

1. Step 1: Write the proportion equation
   74,458 : 102,749.72 = 42,624.78 : x
2. Step 2: Convert to fraction form
   74,458/102,749.72 = 42,624.78/x
3. Step 3: Cross multiply
   74,458x = 102,749.72 × 42,624.78
4. Step 4: Simplify right side
   74,458x = 4,379,684,210.06
5. Step 5: Solve for x
   x = 4,379,684,210.06/74,458
6. Step 6: Final answer
   x = 58,820.87