Finding the Fourth Proportional to 76,346, 105,357.48 and 42,812

Step by Step Solution

1. Step 1: Write the proportion equation
   76,346 : 105,357.48 = 42,812 : x
2. Step 2: Convert to fraction form
   76,346/105,357.48 = 42,812/x
3. Step 3: Cross multiply
   76,346x = 105,357.48 × 42,812
4. Step 4: Simplify right side
   76,346x = 4,510,564,433.76
5. Step 5: Solve for x
   x = 4,510,564,433.76/76,346
6. Step 6: Final answer
   x = 59,080.56