Finding the Fourth Proportional to 99,131.75, 136,784.18 and 56,111.03

Step by Step Solution

1. Step 1: Write the proportion equation
   99,131.75 : 136,784.18 = 56,111.03 : x
2. Step 2: Convert to fraction form
   99,131.75/136,784.18 = 56,111.03/x
3. Step 3: Cross multiply
   99,131.75x = 136,784.18 × 56,111.03
4. Step 4: Simplify right side
   99,131.75x = 7,675,100,946.95
5. Step 5: Solve for x
   x = 7,675,100,946.95/99,131.75
6. Step 6: Final answer
   x = 77,423.24