Finding the Fourth Proportional to 42,066.61, 63,047.29 and 21,012.53

Step by Step Solution

1. Step 1: Write the proportion equation
   42,066.61 : 63,047.29 = 21,012.53 : x
2. Step 2: Convert to fraction form
   42,066.61/63,047.29 = 21,012.53/x
3. Step 3: Cross multiply
   42,066.61x = 63,047.29 × 21,012.53
4. Step 4: Simplify right side
   42,066.61x = 1,324,782,862.38
5. Step 5: Solve for x
   x = 1,324,782,862.38/42,066.61
6. Step 6: Final answer
   x = 31,492.51