Finding the Fourth Proportional to 136,427.10, 204,663.05 and 42,910.30

Step by Step Solution

1. Step 1: Write the proportion equation
   136,427.10 : 204,663.05 = 42,910.30 : x
2. Step 2: Convert to fraction form
   136,427.10/204,663.05 = 42,910.30/x
3. Step 3: Cross multiply
   136,427.10x = 204,663.05 × 42,910.30
4. Step 4: Simplify right side
   136,427.10x = 8,782,152,874.42
5. Step 5: Solve for x
   x = 8,782,152,874.42/136,427.10
6. Step 6: Final answer
   x = 64,372.50