Finding the Fourth Proportional to 42,933.61, 64,409.52 and 12,948.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,933.61 : 64,409.52 = 12,948.76 : x
2. Step 2: Convert to fraction form
   42,933.61/64,409.52 = 12,948.76/x
3. Step 3: Cross multiply
   42,933.61x = 64,409.52 × 12,948.76
4. Step 4: Simplify right side
   42,933.61x = 834,023,094.15
5. Step 5: Solve for x
   x = 834,023,094.15/42,933.61
6. Step 6: Final answer
   x = 19,425.88