Finding the Fourth Proportional to 56,089, 77,402.98 and 30,938.28

Step by Step Solution

1. Step 1: Write the proportion equation
   56,089 : 77,402.98 = 30,938.28 : x
2. Step 2: Convert to fraction form
   56,089/77,402.98 = 30,938.28/x
3. Step 3: Cross multiply
   56,089x = 77,402.98 × 30,938.28
4. Step 4: Simplify right side
   56,089x = 2,394,715,068.07
5. Step 5: Solve for x
   x = 2,394,715,068.07/56,089
6. Step 6: Final answer
   x = 42,694.91