Finding the Fourth Proportional to 42,748.34, 64,123.59 and 20,253.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,748.34 : 64,123.59 = 20,253.74 : x
2. Step 2: Convert to fraction form
   42,748.34/64,123.59 = 20,253.74/x
3. Step 3: Cross multiply
   42,748.34x = 64,123.59 × 20,253.74
4. Step 4: Simplify right side
   42,748.34x = 1,298,742,519.73
5. Step 5: Solve for x
   x = 1,298,742,519.73/42,748.34
6. Step 6: Final answer
   x = 30,381.12