Finding the Fourth Proportional to 60,670.70, 91,010.64 and 20,677.25

Step by Step Solution

1. Step 1: Write the proportion equation
   60,670.70 : 91,010.64 = 20,677.25 : x
2. Step 2: Convert to fraction form
   60,670.70/91,010.64 = 20,677.25/x
3. Step 3: Cross multiply
   60,670.70x = 91,010.64 × 20,677.25
4. Step 4: Simplify right side
   60,670.70x = 1,881,849,300.89
5. Step 5: Solve for x
   x = 1,881,849,300.89/60,670.70
6. Step 6: Final answer
   x = 31,017.43