Finding the Fourth Proportional to 102,914, 142,021.32 and 55,810

Step by Step Solution

1. Step 1: Write the proportion equation
   102,914 : 142,021.32 = 55,810 : x
2. Step 2: Convert to fraction form
   102,914/142,021.32 = 55,810/x
3. Step 3: Cross multiply
   102,914x = 142,021.32 × 55,810
4. Step 4: Simplify right side
   102,914x = 7,926,209,869.20
5. Step 5: Solve for x
   x = 7,926,209,869.20/102,914
6. Step 6: Final answer
   x = 77,017.80