Finding the Fourth Proportional to 139,887.72, 192,814.47 and 98,999.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,887.72 : 192,814.47 = 98,999.10 : x
2. Step 2: Convert to fraction form
   139,887.72/192,814.47 = 98,999.10/x
3. Step 3: Cross multiply
   139,887.72x = 192,814.47 × 98,999.10
4. Step 4: Simplify right side
   139,887.72x = 19,088,458,996.98
5. Step 5: Solve for x
   x = 19,088,458,996.98/139,887.72
6. Step 6: Final answer
   x = 136,455.57