Finding the Fourth Proportional to 99,061.42, 136,704.30 and 53,739.43

Step by Step Solution

1. Step 1: Write the proportion equation
   99,061.42 : 136,704.30 = 53,739.43 : x
2. Step 2: Convert to fraction form
   99,061.42/136,704.30 = 53,739.43/x
3. Step 3: Cross multiply
   99,061.42x = 136,704.30 × 53,739.43
4. Step 4: Simplify right side
   99,061.42x = 7,346,411,160.55
5. Step 5: Solve for x
   x = 7,346,411,160.55/99,061.42
6. Step 6: Final answer
   x = 74,160.16