Finding the Fourth Proportional to 76,215.47, 105,174.05 and 42,225.30

Step by Step Solution

1. Step 1: Write the proportion equation
   76,215.47 : 105,174.05 = 42,225.30 : x
2. Step 2: Convert to fraction form
   76,215.47/105,174.05 = 42,225.30/x
3. Step 3: Cross multiply
   76,215.47x = 105,174.05 × 42,225.30
4. Step 4: Simplify right side
   76,215.47x = 4,441,005,602.34
5. Step 5: Solve for x
   x = 4,441,005,602.34/76,215.47
6. Step 6: Final answer
   x = 58,269.09