Finding the Fourth Proportional to 99,642, 137,499.06 and 56,041.08

Step by Step Solution

1. Step 1: Write the proportion equation
   99,642 : 137,499.06 = 56,041.08 : x
2. Step 2: Convert to fraction form
   99,642/137,499.06 = 56,041.08/x
3. Step 3: Cross multiply
   99,642x = 137,499.06 × 56,041.08
4. Step 4: Simplify right side
   99,642x = 7,705,595,821.38
5. Step 5: Solve for x
   x = 7,705,595,821.38/99,642
6. Step 6: Final answer
   x = 77,332.81