Finding the Fourth Proportional to 76,470.21, 105,530.82 and 42,477.06

Step by Step Solution

1. Step 1: Write the proportion equation
   76,470.21 : 105,530.82 = 42,477.06 : x
2. Step 2: Convert to fraction form
   76,470.21/105,530.82 = 42,477.06/x
3. Step 3: Cross multiply
   76,470.21x = 105,530.82 × 42,477.06
4. Step 4: Simplify right side
   76,470.21x = 4,482,638,972.99
5. Step 5: Solve for x
   x = 4,482,638,972.99/76,470.21
6. Step 6: Final answer
   x = 58,619.41