Finding the Fourth Proportional to 78,798.87, 108,741.42 and 42,988.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,798.87 : 108,741.42 = 42,988.12 : x
2. Step 2: Convert to fraction form
   78,798.87/108,741.42 = 42,988.12/x
3. Step 3: Cross multiply
   78,798.87x = 108,741.42 × 42,988.12
4. Step 4: Simplify right side
   78,798.87x = 4,674,588,940.08
5. Step 5: Solve for x
   x = 4,674,588,940.08/78,798.87
6. Step 6: Final answer
   x = 59,323.05