Finding the Fourth Proportional to 58,716, 88,086.96 and 21,780

Step by Step Solution

1. Step 1: Write the proportion equation
   58,716 : 88,086.96 = 21,780 : x
2. Step 2: Convert to fraction form
   58,716/88,086.96 = 21,780/x
3. Step 3: Cross multiply
   58,716x = 88,086.96 × 21,780
4. Step 4: Simplify right side
   58,716x = 1,918,533,988.80
5. Step 5: Solve for x
   x = 1,918,533,988.80/58,716
6. Step 6: Final answer
   x = 32,674.81