Finding the Fourth Proportional to 128,084,306.42, 191,925,275.67 and 99,009,388.01

Step by Step Solution

1. Step 1: Write the proportion equation
   128,084,306.42 : 191,925,275.67 = 99,009,388.01 : x
2. Step 2: Convert to fraction form
   128,084,306.42/191,925,275.67 = 99,009,388.01/x
3. Step 3: Cross multiply
   128,084,306.42x = 191,925,275.67 × 99,009,388.01
4. Step 4: Simplify right side
   128,084,306.42x = 19,002,404,086,777,616
5. Step 5: Solve for x
   x = 19,002,404,086,777,616/128,084,306.42
6. Step 6: Final answer
   x = 148,358,566.47