Finding the Fourth Proportional to 42,892.61, 59,212.71 and 28,560.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,892.61 : 59,212.71 = 28,560.91 : x
2. Step 2: Convert to fraction form
   42,892.61/59,212.71 = 28,560.91/x
3. Step 3: Cross multiply
   42,892.61x = 59,212.71 × 28,560.91
4. Step 4: Simplify right side
   42,892.61x = 1,691,168,881.17
5. Step 5: Solve for x
   x = 1,691,168,881.17/42,892.61
6. Step 6: Final answer
   x = 39,427.98