Finding the Fourth Proportional to 78,798.71, 108,740.07 and 42,988.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,798.71 : 108,740.07 = 42,988.71 : x
2. Step 2: Convert to fraction form
   78,798.71/108,740.07 = 42,988.71/x
3. Step 3: Cross multiply
   78,798.71x = 108,740.07 × 42,988.71
4. Step 4: Simplify right side
   78,798.71x = 4,674,595,606.46
5. Step 5: Solve for x
   x = 4,674,595,606.46/78,798.71
6. Step 6: Final answer
   x = 59,323.25