Finding the Fourth Proportional to 76,661, 105,792.30 and 42,666.92

Step by Step Solution

1. Step 1: Write the proportion equation
   76,661 : 105,792.30 = 42,666.92 : x
2. Step 2: Convert to fraction form
   76,661/105,792.30 = 42,666.92/x
3. Step 3: Cross multiply
   76,661x = 105,792.30 × 42,666.92
4. Step 4: Simplify right side
   76,661x = 4,513,831,600.72
5. Step 5: Solve for x
   x = 4,513,831,600.72/76,661
6. Step 6: Final answer
   x = 58,880.42