Finding the Fourth Proportional to 42,380.01, 58,492.47 and 28,040.13

Step by Step Solution

1. Step 1: Write the proportion equation
   42,380.01 : 58,492.47 = 28,040.13 : x
2. Step 2: Convert to fraction form
   42,380.01/58,492.47 = 28,040.13/x
3. Step 3: Cross multiply
   42,380.01x = 58,492.47 × 28,040.13
4. Step 4: Simplify right side
   42,380.01x = 1,640,136,462.82
5. Step 5: Solve for x
   x = 1,640,136,462.82/42,380.01
6. Step 6: Final answer
   x = 38,700.71