Finding the Fourth Proportional to 99,421.49, 137,156.29 and 59,112.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,421.49 : 137,156.29 = 59,112.32 : x
2. Step 2: Convert to fraction form
   99,421.49/137,156.29 = 59,112.32/x
3. Step 3: Cross multiply
   99,421.49x = 137,156.29 × 59,112.32
4. Step 4: Simplify right side
   99,421.49x = 8,107,625,670.93
5. Step 5: Solve for x
   x = 8,107,625,670.93/99,421.49
6. Step 6: Final answer
   x = 81,548.02