Finding the Third Proportional to 55,938 and 78,210

Step by Step Solution

1. Step 1: Write the proportion equation
   55,938 : 78,210 = 78,210 : x
2. Step 2: Convert to fraction form
   55,938/78,210 = 78,210/x
3. Step 3: Cross multiply
   55,938x = 78,210 × 78,210
4. Step 4: Simplify right side
   55,938x = 6,116,804,100
5. Step 5: Solve for x
   x = 6,116,804,100/55,938
6. Step 6: Final answer
   x = 109,349.71