Finding the Fourth Proportional to 99,403,142.34, 137,175,028.59 and 54,748,257.06

Step by Step Solution

1. Step 1: Write the proportion equation
   99,403,142.34 : 137,175,028.59 = 54,748,257.06 : x
2. Step 2: Convert to fraction form
   99,403,142.34/137,175,028.59 = 54,748,257.06/x
3. Step 3: Cross multiply
   99,403,142.34x = 137,175,028.59 × 54,748,257.06
4. Step 4: Simplify right side
   99,403,142.34x = 7,510,093,727,458,170
5. Step 5: Solve for x
   x = 7,510,093,727,458,170/99,403,142.34
6. Step 6: Final answer
   x = 75,551,874.42