Finding the Fourth Proportional to 286,104.72, 429,185.40 and 99,114.96

Step by Step Solution

1. Step 1: Write the proportion equation
   286,104.72 : 429,185.40 = 99,114.96 : x
2. Step 2: Convert to fraction form
   286,104.72/429,185.40 = 99,114.96/x
3. Step 3: Cross multiply
   286,104.72x = 429,185.40 × 99,114.96
4. Step 4: Simplify right side
   286,104.72x = 42,538,693,753.58
5. Step 5: Solve for x
   x = 42,538,693,753.58/286,104.72
6. Step 6: Final answer
   x = 148,682.25