Finding the Fourth Proportional to 102,925, 142,036.50 and 55,821

Step by Step Solution

1. Step 1: Write the proportion equation
   102,925 : 142,036.50 = 55,821 : x
2. Step 2: Convert to fraction form
   102,925/142,036.50 = 55,821/x
3. Step 3: Cross multiply
   102,925x = 142,036.50 × 55,821
4. Step 4: Simplify right side
   102,925x = 7,928,619,466.50
5. Step 5: Solve for x
   x = 7,928,619,466.50/102,925
6. Step 6: Final answer
   x = 77,032.98