Finding the Fourth Proportional to 61,100.24, 91,664.67 and 18,978.17

Step by Step Solution

1. Step 1: Write the proportion equation
   61,100.24 : 91,664.67 = 18,978.17 : x
2. Step 2: Convert to fraction form
   61,100.24/91,664.67 = 18,978.17/x
3. Step 3: Cross multiply
   61,100.24x = 91,664.67 × 18,978.17
4. Step 4: Simplify right side
   61,100.24x = 1,739,627,690.25
5. Step 5: Solve for x
   x = 1,739,627,690.25/61,100.24
6. Step 6: Final answer
   x = 28,471.70