Finding the Fourth Proportional to 74,300.10, 111,450.15 and 42,807.30

Step by Step Solution

1. Step 1: Write the proportion equation
   74,300.10 : 111,450.15 = 42,807.30 : x
2. Step 2: Convert to fraction form
   74,300.10/111,450.15 = 42,807.30/x
3. Step 3: Cross multiply
   74,300.10x = 111,450.15 × 42,807.30
4. Step 4: Simplify right side
   74,300.10x = 4,770,880,006.10
5. Step 5: Solve for x
   x = 4,770,880,006.10/74,300.10
6. Step 6: Final answer
   x = 64,210.95