Finding the Fourth Proportional to 74,639.12, 103,011.72 and 42,801.80

Step by Step Solution

1. Step 1: Write the proportion equation
   74,639.12 : 103,011.72 = 42,801.80 : x
2. Step 2: Convert to fraction form
   74,639.12/103,011.72 = 42,801.80/x
3. Step 3: Cross multiply
   74,639.12x = 103,011.72 × 42,801.80
4. Step 4: Simplify right side
   74,639.12x = 4,409,087,037.10
5. Step 5: Solve for x
   x = 4,409,087,037.10/74,639.12
6. Step 6: Final answer
   x = 59,072.07