Finding the Fourth Proportional to 61,142.15, 91,717.13 and 21,164.98

Step by Step Solution

1. Step 1: Write the proportion equation
   61,142.15 : 91,717.13 = 21,164.98 : x
2. Step 2: Convert to fraction form
   61,142.15/91,717.13 = 21,164.98/x
3. Step 3: Cross multiply
   61,142.15x = 91,717.13 × 21,164.98
4. Step 4: Simplify right side
   61,142.15x = 1,941,191,045.73
5. Step 5: Solve for x
   x = 1,941,191,045.73/61,142.15
6. Step 6: Final answer
   x = 31,748.82