Finding the Fourth Proportional to 56,488.88, 84,733.29 and 21,428.53

Step by Step Solution

1. Step 1: Write the proportion equation
   56,488.88 : 84,733.29 = 21,428.53 : x
2. Step 2: Convert to fraction form
   56,488.88/84,733.29 = 21,428.53/x
3. Step 3: Cross multiply
   56,488.88x = 84,733.29 × 21,428.53
4. Step 4: Simplify right side
   56,488.88x = 1,815,710,111.56
5. Step 5: Solve for x
   x = 1,815,710,111.56/56,488.88
6. Step 6: Final answer
   x = 32,142.79