Finding the Fourth Proportional to 73,981.84, 110,978.16 and 21,391.60

Step by Step Solution

1. Step 1: Write the proportion equation
   73,981.84 : 110,978.16 = 21,391.60 : x
2. Step 2: Convert to fraction form
   73,981.84/110,978.16 = 21,391.60/x
3. Step 3: Cross multiply
   73,981.84x = 110,978.16 × 21,391.60
4. Step 4: Simplify right side
   73,981.84x = 2,374,000,407.46
5. Step 5: Solve for x
   x = 2,374,000,407.46/73,981.84
6. Step 6: Final answer
   x = 32,088.96