Finding the Fourth Proportional to 93,639, 129,289.52 and 57,878.04

Step by Step Solution

1. Step 1: Write the proportion equation
   93,639 : 129,289.52 = 57,878.04 : x
2. Step 2: Convert to fraction form
   93,639/129,289.52 = 57,878.04/x
3. Step 3: Cross multiply
   93,639x = 129,289.52 × 57,878.04
4. Step 4: Simplify right side
   93,639x = 7,483,024,010.14
5. Step 5: Solve for x
   x = 7,483,024,010.14/93,639
6. Step 6: Final answer
   x = 79,913.54