Finding the Fourth Proportional to 52,090.50, 78,139.62 and 20,925.84

Step by Step Solution

1. Step 1: Write the proportion equation
   52,090.50 : 78,139.62 = 20,925.84 : x
2. Step 2: Convert to fraction form
   52,090.50/78,139.62 = 20,925.84/x
3. Step 3: Cross multiply
   52,090.50x = 78,139.62 × 20,925.84
4. Step 4: Simplify right side
   52,090.50x = 1,635,137,185.78
5. Step 5: Solve for x
   x = 1,635,137,185.78/52,090.50
6. Step 6: Final answer
   x = 31,390.31