Finding the Fourth Proportional to 99,445,142.88, 137,227,243.23 and 54,789,164.37

Step by Step Solution

1. Step 1: Write the proportion equation
   99,445,142.88 : 137,227,243.23 = 54,789,164.37 : x
2. Step 2: Convert to fraction form
   99,445,142.88/137,227,243.23 = 54,789,164.37/x
3. Step 3: Cross multiply
   99,445,142.88x = 137,227,243.23 × 54,789,164.37
4. Step 4: Simplify right side
   99,445,142.88x = 7,518,565,985,370,439
5. Step 5: Solve for x
   x = 7,518,565,985,370,439/99,445,142.88
6. Step 6: Final answer
   x = 75,605,160.47