Finding the Fourth Proportional to 139,748,580.81, 192,896,724.51 and 90,189,050.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,748,580.81 : 192,896,724.51 = 90,189,050.31 : x
2. Step 2: Convert to fraction form
   139,748,580.81/192,896,724.51 = 90,189,050.31/x
3. Step 3: Cross multiply
   139,748,580.81x = 192,896,724.51 × 90,189,050.31
4. Step 4: Simplify right side
   139,748,580.81x = 17,397,172,391,466,600
5. Step 5: Solve for x
   x = 17,397,172,391,466,600/139,748,580.81
6. Step 6: Final answer
   x = 124,489,080.97