Finding the Fourth Proportional to 69,900.42, 104,854.10 and 19,987.86

Step by Step Solution

1. Step 1: Write the proportion equation
   69,900.42 : 104,854.10 = 19,987.86 : x
2. Step 2: Convert to fraction form
   69,900.42/104,854.10 = 19,987.86/x
3. Step 3: Cross multiply
   69,900.42x = 104,854.10 × 19,987.86
4. Step 4: Simplify right side
   69,900.42x = 2,095,808,971.29
5. Step 5: Solve for x
   x = 2,095,808,971.29/69,900.42
6. Step 6: Final answer
   x = 29,982.78