Finding the Fourth Proportional to 42,885.60, 64,346.01 and 17,930.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,885.60 : 64,346.01 = 17,930.91 : x
2. Step 2: Convert to fraction form
   42,885.60/64,346.01 = 17,930.91/x
3. Step 3: Cross multiply
   42,885.60x = 64,346.01 × 17,930.91
4. Step 4: Simplify right side
   42,885.60x = 1,153,782,514.17
5. Step 5: Solve for x
   x = 1,153,782,514.17/42,885.60
6. Step 6: Final answer
   x = 26,903.73