Finding the Fourth Proportional to 136,462.90, 204,723.15 and 42,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   136,462.90 : 204,723.15 = 42,978.10 : x
2. Step 2: Convert to fraction form
   136,462.90/204,723.15 = 42,978.10/x
3. Step 3: Cross multiply
   136,462.90x = 204,723.15 × 42,978.10
4. Step 4: Simplify right side
   136,462.90x = 8,798,612,013.02
5. Step 5: Solve for x
   x = 8,798,612,013.02/136,462.90
6. Step 6: Final answer
   x = 64,476.22