Finding the Fourth Proportional to 21,665,612.88, 29,881,111.56 and 19,046,517.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,665,612.88 : 29,881,111.56 = 19,046,517.20 : x
2. Step 2: Convert to fraction form
   21,665,612.88/29,881,111.56 = 19,046,517.20/x
3. Step 3: Cross multiply
   21,665,612.88x = 29,881,111.56 × 19,046,517.20
4. Step 4: Simplify right side
   21,665,612.88x = 569,131,105,282,658.75
5. Step 5: Solve for x
   x = 569,131,105,282,658.75/21,665,612.88
6. Step 6: Final answer
   x = 26,268,867.10