Finding the Fourth Proportional to 42,902.76, 64,354.20 and 17,929.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,902.76 : 64,354.20 = 17,929.15 : x
2. Step 2: Convert to fraction form
   42,902.76/64,354.20 = 17,929.15/x
3. Step 3: Cross multiply
   42,902.76x = 64,354.20 × 17,929.15
4. Step 4: Simplify right side
   42,902.76x = 1,153,815,876.81
5. Step 5: Solve for x
   x = 1,153,815,876.81/42,902.76
6. Step 6: Final answer
   x = 26,893.74