Finding the Fourth Proportional to 76,131, 105,060.78 and 42,603.48

Step by Step Solution

1. Step 1: Write the proportion equation
   76,131 : 105,060.78 = 42,603.48 : x
2. Step 2: Convert to fraction form
   76,131/105,060.78 = 42,603.48/x
3. Step 3: Cross multiply
   76,131x = 105,060.78 × 42,603.48
4. Step 4: Simplify right side
   76,131x = 4,475,954,839.51
5. Step 5: Solve for x
   x = 4,475,954,839.51/76,131
6. Step 6: Final answer
   x = 58,792.80