Finding the Fourth Proportional to 99,139.83, 136,814.03 and 53,818.23

Step by Step Solution

1. Step 1: Write the proportion equation
   99,139.83 : 136,814.03 = 53,818.23 : x
2. Step 2: Convert to fraction form
   99,139.83/136,814.03 = 53,818.23/x
3. Step 3: Cross multiply
   99,139.83x = 136,814.03 × 53,818.23
4. Step 4: Simplify right side
   99,139.83x = 7,363,088,933.77
5. Step 5: Solve for x
   x = 7,363,088,933.77/99,139.83
6. Step 6: Final answer
   x = 74,269.74