Finding the Fourth Proportional to 99,738.90, 137,644.94 and 57,300.16

Step by Step Solution

1. Step 1: Write the proportion equation
   99,738.90 : 137,644.94 = 57,300.16 : x
2. Step 2: Convert to fraction form
   99,738.90/137,644.94 = 57,300.16/x
3. Step 3: Cross multiply
   99,738.90x = 137,644.94 × 57,300.16
4. Step 4: Simplify right side
   99,738.90x = 7,887,077,085.19
5. Step 5: Solve for x
   x = 7,887,077,085.19/99,738.90
6. Step 6: Final answer
   x = 79,077.24