Finding the Fourth Proportional to 70,592.42, 105,892.77 and 19,987.22

Step by Step Solution

1. Step 1: Write the proportion equation
   70,592.42 : 105,892.77 = 19,987.22 : x
2. Step 2: Convert to fraction form
   70,592.42/105,892.77 = 19,987.22/x
3. Step 3: Cross multiply
   70,592.42x = 105,892.77 × 19,987.22
4. Step 4: Simplify right side
   70,592.42x = 2,116,502,090.40
5. Step 5: Solve for x
   x = 2,116,502,090.40/70,592.42
6. Step 6: Final answer
   x = 29,982.00