Finding the Fourth Proportional to 31,045.02, 42,892.23 and 21,655.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,045.02 : 42,892.23 = 21,655.50 : x
2. Step 2: Convert to fraction form
   31,045.02/42,892.23 = 21,655.50/x
3. Step 3: Cross multiply
   31,045.02x = 42,892.23 × 21,655.50
4. Step 4: Simplify right side
   31,045.02x = 928,852,686.77
5. Step 5: Solve for x
   x = 928,852,686.77/31,045.02
6. Step 6: Final answer
   x = 29,919.54