Finding the Fourth Proportional to 136,988.82, 205,499.61 and 58,092.78

Step by Step Solution

1. Step 1: Write the proportion equation
   136,988.82 : 205,499.61 = 58,092.78 : x
2. Step 2: Convert to fraction form
   136,988.82/205,499.61 = 58,092.78/x
3. Step 3: Cross multiply
   136,988.82x = 205,499.61 × 58,092.78
4. Step 4: Simplify right side
   136,988.82x = 11,938,043,633.82
5. Step 5: Solve for x
   x = 11,938,043,633.82/136,988.82
6. Step 6: Final answer
   x = 87,146.12